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diff --git a/docs/openid.md b/docs/openid.md
index da391f74aa..9d19368845 100644
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+++ b/docs/openid.md
@@ -42,40 +42,41 @@ as follows:
  * For other installation mechanisms, see the documentation provided by the
    maintainer.
 
-To enable the OpenID integration, you should then add an `oidc_config` section
-to your configuration file (or uncomment the `enabled: true` line in the
-existing section). See [sample_config.yaml](./sample_config.yaml) for some
-sample settings, as well as the text below for example configurations for
-specific providers.
+To enable the OpenID integration, you should then add a section to the `oidc_providers`
+setting in your configuration file (or uncomment one of the existing examples).
+See [sample_config.yaml](./sample_config.yaml) for some sample settings, as well as
+the text below for example configurations for specific providers.
 
 ## Sample configs
 
 Here are a few configs for providers that should work with Synapse.
 
 ### Microsoft Azure Active Directory
-Azure AD can act as an OpenID Connect Provider. Register a new application under 
+Azure AD can act as an OpenID Connect Provider. Register a new application under
 *App registrations* in the Azure AD management console. The RedirectURI for your
-application should point to your matrix server: `[synapse public baseurl]/_synapse/oidc/callback`
+application should point to your matrix server:
+`[synapse public baseurl]/_synapse/client/oidc/callback`
 
-Go to *Certificates & secrets* and register a new client secret. Make note of your 
+Go to *Certificates & secrets* and register a new client secret. Make note of your
 Directory (tenant) ID as it will be used in the Azure links.
 Edit your Synapse config file and change the `oidc_config` section:
 
 ```yaml
-oidc_config:
-   enabled: true
-   issuer: "https://login.microsoftonline.com/<tenant id>/v2.0"
-   client_id: "<client id>"
-   client_secret: "<client secret>"
-   scopes: ["openid", "profile"]
-   authorization_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/authorize"
-   token_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/token"
-   userinfo_endpoint: "https://graph.microsoft.com/oidc/userinfo"
-
-   user_mapping_provider:
-     config:
-       localpart_template: "{{ user.preferred_username.split('@')[0] }}"
-       display_name_template: "{{ user.name }}"
+oidc_providers:
+  - idp_id: microsoft
+    idp_name: Microsoft
+    issuer: "https://login.microsoftonline.com/<tenant id>/v2.0"
+    client_id: "<client id>"
+    client_secret: "<client secret>"
+    scopes: ["openid", "profile"]
+    authorization_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/authorize"
+    token_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/token"
+    userinfo_endpoint: "https://graph.microsoft.com/oidc/userinfo"
+
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.preferred_username.split('@')[0] }}"
+        display_name_template: "{{ user.name }}"
 ```
 
 ### [Dex][dex-idp]
@@ -94,7 +95,7 @@ staticClients:
 - id: synapse
   secret: secret
   redirectURIs:
-  - '[synapse public baseurl]/_synapse/oidc/callback'
+  - '[synapse public baseurl]/_synapse/client/oidc/callback'
   name: 'Synapse'
 ```
 
@@ -103,21 +104,22 @@ Run with `dex serve examples/config-dev.yaml`.
 Synapse config:
 
 ```yaml
-oidc_config:
-   enabled: true
-   skip_verification: true # This is needed as Dex is served on an insecure endpoint
-   issuer: "http://127.0.0.1:5556/dex"
-   client_id: "synapse"
-   client_secret: "secret"
-   scopes: ["openid", "profile"]
-   user_mapping_provider:
-     config:
-       localpart_template: "{{ user.name }}"
-       display_name_template: "{{ user.name|capitalize }}"
+oidc_providers:
+  - idp_id: dex
+    idp_name: "My Dex server"
+    skip_verification: true # This is needed as Dex is served on an insecure endpoint
+    issuer: "http://127.0.0.1:5556/dex"
+    client_id: "synapse"
+    client_secret: "secret"
+    scopes: ["openid", "profile"]
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.name }}"
+        display_name_template: "{{ user.name|capitalize }}"
 ```
 ### [Keycloak][keycloak-idp]
 
-[Keycloak][keycloak-idp] is an opensource IdP maintained by Red Hat. 
+[Keycloak][keycloak-idp] is an opensource IdP maintained by Red Hat.
 
 Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to install Keycloak and set up a realm.
 
@@ -139,7 +141,7 @@ Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to
 | Enabled | `On` |
 | Client Protocol | `openid-connect` |
 | Access Type | `confidential` |
-| Valid Redirect URIs | `[synapse public baseurl]/_synapse/oidc/callback` |
+| Valid Redirect URIs | `[synapse public baseurl]/_synapse/client/oidc/callback` |
 
 5. Click `Save`
 6. On the Credentials tab, update the fields:
@@ -152,17 +154,22 @@ Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to
 8. Copy Secret
 
 ```yaml
-oidc_config:
-   enabled: true
-   issuer: "https://127.0.0.1:8443/auth/realms/{realm_name}"
-   client_id: "synapse"
-   client_secret: "copy secret generated from above"
-   scopes: ["openid", "profile"]
+oidc_providers:
+  - idp_id: keycloak
+    idp_name: "My KeyCloak server"
+    issuer: "https://127.0.0.1:8443/auth/realms/{realm_name}"
+    client_id: "synapse"
+    client_secret: "copy secret generated from above"
+    scopes: ["openid", "profile"]
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.preferred_username }}"
+        display_name_template: "{{ user.name }}"
 ```
 ### [Auth0][auth0]
 
 1. Create a regular web application for Synapse
-2. Set the Allowed Callback URLs to `[synapse public baseurl]/_synapse/oidc/callback`
+2. Set the Allowed Callback URLs to `[synapse public baseurl]/_synapse/client/oidc/callback`
 3. Add a rule to add the `preferred_username` claim.
    <details>
     <summary>Code sample</summary>
@@ -187,16 +194,17 @@ oidc_config:
 Synapse config:
 
 ```yaml
-oidc_config:
-   enabled: true
-   issuer: "https://your-tier.eu.auth0.com/" # TO BE FILLED
-   client_id: "your-client-id" # TO BE FILLED
-   client_secret: "your-client-secret" # TO BE FILLED
-   scopes: ["openid", "profile"]
-   user_mapping_provider:
-     config:
-       localpart_template: "{{ user.preferred_username }}"
-       display_name_template: "{{ user.name }}"
+oidc_providers:
+  - idp_id: auth0
+    idp_name: Auth0
+    issuer: "https://your-tier.eu.auth0.com/" # TO BE FILLED
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    scopes: ["openid", "profile"]
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.preferred_username }}"
+        display_name_template: "{{ user.name }}"
 ```
 
 ### GitHub
@@ -210,26 +218,28 @@ login mechanism needs an attribute to uniquely identify users, and that endpoint
 does not return a `sub` property, an alternative `subject_claim` has to be set.
 
 1. Create a new OAuth application: https://github.com/settings/applications/new.
-2. Set the callback URL to `[synapse public baseurl]/_synapse/oidc/callback`.
+2. Set the callback URL to `[synapse public baseurl]/_synapse/client/oidc/callback`.
 
 Synapse config:
 
 ```yaml
-oidc_config:
-   enabled: true
-   discover: false
-   issuer: "https://github.com/"
-   client_id: "your-client-id" # TO BE FILLED
-   client_secret: "your-client-secret" # TO BE FILLED
-   authorization_endpoint: "https://github.com/login/oauth/authorize"
-   token_endpoint: "https://github.com/login/oauth/access_token"
-   userinfo_endpoint: "https://api.github.com/user"
-   scopes: ["read:user"]
-   user_mapping_provider:
-     config:
-       subject_claim: "id"
-       localpart_template: "{{ user.login }}"
-       display_name_template: "{{ user.name }}"
+oidc_providers:
+  - idp_id: github
+    idp_name: Github
+    idp_brand: "org.matrix.github"  # optional: styling hint for clients
+    discover: false
+    issuer: "https://github.com/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    authorization_endpoint: "https://github.com/login/oauth/authorize"
+    token_endpoint: "https://github.com/login/oauth/access_token"
+    userinfo_endpoint: "https://api.github.com/user"
+    scopes: ["read:user"]
+    user_mapping_provider:
+      config:
+        subject_claim: "id"
+        localpart_template: "{{ user.login }}"
+        display_name_template: "{{ user.name }}"
 ```
 
 ### [Google][google-idp]
@@ -239,60 +249,142 @@ oidc_config:
 2. add an "OAuth Client ID" for a Web Application under "Credentials".
 3. Copy the Client ID and Client Secret, and add the following to your synapse config:
    ```yaml
-   oidc_config:
-     enabled: true
-     issuer: "https://accounts.google.com/"
-     client_id: "your-client-id" # TO BE FILLED
-     client_secret: "your-client-secret" # TO BE FILLED
-     scopes: ["openid", "profile"]
-     user_mapping_provider:
-       config:
-         localpart_template: "{{ user.given_name|lower }}"
-         display_name_template: "{{ user.name }}"
+   oidc_providers:
+     - idp_id: google
+       idp_name: Google
+       idp_brand: "org.matrix.google"  # optional: styling hint for clients
+       issuer: "https://accounts.google.com/"
+       client_id: "your-client-id" # TO BE FILLED
+       client_secret: "your-client-secret" # TO BE FILLED
+       scopes: ["openid", "profile"]
+       user_mapping_provider:
+         config:
+           localpart_template: "{{ user.given_name|lower }}"
+           display_name_template: "{{ user.name }}"
    ```
 4. Back in the Google console, add this Authorized redirect URI: `[synapse
-   public baseurl]/_synapse/oidc/callback`.
+   public baseurl]/_synapse/client/oidc/callback`.
 
 ### Twitch
 
 1. Setup a developer account on [Twitch](https://dev.twitch.tv/)
 2. Obtain the OAuth 2.0 credentials by [creating an app](https://dev.twitch.tv/console/apps/)
-3. Add this OAuth Redirect URL: `[synapse public baseurl]/_synapse/oidc/callback`
+3. Add this OAuth Redirect URL: `[synapse public baseurl]/_synapse/client/oidc/callback`
 
 Synapse config:
 
 ```yaml
-oidc_config:
-  enabled: true
-  issuer: "https://id.twitch.tv/oauth2/"
-  client_id: "your-client-id" # TO BE FILLED
-  client_secret: "your-client-secret" # TO BE FILLED
-  client_auth_method: "client_secret_post"
-  user_mapping_provider:
-    config:
-      localpart_template: "{{ user.preferred_username }}"
-      display_name_template: "{{ user.name }}"
+oidc_providers:
+  - idp_id: twitch
+    idp_name: Twitch
+    issuer: "https://id.twitch.tv/oauth2/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    client_auth_method: "client_secret_post"
+    user_mapping_provider:
+      config:
+        localpart_template: "{{ user.preferred_username }}"
+        display_name_template: "{{ user.name }}"
 ```
 
 ### GitLab
 
 1. Create a [new application](https://gitlab.com/profile/applications).
 2. Add the `read_user` and `openid` scopes.
-3. Add this Callback URL: `[synapse public baseurl]/_synapse/oidc/callback`
+3. Add this Callback URL: `[synapse public baseurl]/_synapse/client/oidc/callback`
 
 Synapse config:
 
 ```yaml
-oidc_config:
-  enabled: true
-  issuer: "https://gitlab.com/"
-  client_id: "your-client-id" # TO BE FILLED
-  client_secret: "your-client-secret" # TO BE FILLED
-  client_auth_method: "client_secret_post"
-  scopes: ["openid", "read_user"]
-  user_profile_method: "userinfo_endpoint"
-  user_mapping_provider:
-    config:
-      localpart_template: '{{ user.nickname }}'
-      display_name_template: '{{ user.name }}'
+oidc_providers:
+  - idp_id: gitlab
+    idp_name: Gitlab
+    idp_brand: "org.matrix.gitlab"  # optional: styling hint for clients
+    issuer: "https://gitlab.com/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    client_auth_method: "client_secret_post"
+    scopes: ["openid", "read_user"]
+    user_profile_method: "userinfo_endpoint"
+    user_mapping_provider:
+      config:
+        localpart_template: '{{ user.nickname }}'
+        display_name_template: '{{ user.name }}'
+```
+
+### Facebook
+
+Like Github, Facebook provide a custom OAuth2 API rather than an OIDC-compliant
+one so requires a little more configuration.
+
+0. You will need a Facebook developer account. You can register for one
+   [here](https://developers.facebook.com/async/registration/).
+1. On the [apps](https://developers.facebook.com/apps/) page of the developer
+   console, "Create App", and choose "Build Connected Experiences".
+2. Once the app is created, add "Facebook Login" and choose "Web". You don't
+   need to go through the whole form here.
+3. In the left-hand menu, open "Products"/"Facebook Login"/"Settings".
+   * Add `[synapse public baseurl]/_synapse/client/oidc/callback` as an OAuth Redirect
+     URL.
+4. In the left-hand menu, open "Settings/Basic". Here you can copy the "App ID"
+   and "App Secret" for use below.
+
+Synapse config:
+
+```yaml
+  - idp_id: facebook
+    idp_name: Facebook
+    idp_brand: "org.matrix.facebook"  # optional: styling hint for clients
+    discover: false
+    issuer: "https://facebook.com"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    scopes: ["openid", "email"]
+    authorization_endpoint: https://facebook.com/dialog/oauth
+    token_endpoint: https://graph.facebook.com/v9.0/oauth/access_token
+    user_profile_method: "userinfo_endpoint"
+    userinfo_endpoint: "https://graph.facebook.com/v9.0/me?fields=id,name,email,picture"
+    user_mapping_provider:
+      config:
+        subject_claim: "id"
+        display_name_template: "{{ user.name }}"
+```
+
+Relevant documents:
+ * https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow
+ * Using Facebook's Graph API: https://developers.facebook.com/docs/graph-api/using-graph-api/
+ * Reference to the User endpoint: https://developers.facebook.com/docs/graph-api/reference/user
+
+### Gitea
+
+Gitea is, like Github, not an OpenID provider, but just an OAuth2 provider.
+
+The [`/user` API endpoint](https://try.gitea.io/api/swagger#/user/userGetCurrent)
+can be used to retrieve information on the authenticated user. As the Synapse
+login mechanism needs an attribute to uniquely identify users, and that endpoint
+does not return a `sub` property, an alternative `subject_claim` has to be set.
+
+1. Create a new application.
+2. Add this Callback URL: `[synapse public baseurl]/_synapse/oidc/callback`
+
+Synapse config:
+
+```yaml
+oidc_providers:
+  - idp_id: gitea
+    idp_name: Gitea
+    discover: false
+    issuer: "https://your-gitea.com/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    client_auth_method: client_secret_post
+    scopes: [] # Gitea doesn't support Scopes
+    authorization_endpoint: "https://your-gitea.com/login/oauth/authorize"
+    token_endpoint: "https://your-gitea.com/login/oauth/access_token"
+    userinfo_endpoint: "https://your-gitea.com/api/v1/user"
+    user_mapping_provider:
+      config:
+        subject_claim: "id"
+        localpart_template: "{{ user.login }}"
+        display_name_template: "{{ user.full_name }}" 
 ```