diff --git a/.distignore b/.distignore
index 2dd89892..b04108e5 100644
--- a/.distignore
+++ b/.distignore
@@ -25,4 +25,5 @@ phpdoc.xml
 phpstan.neon
 phpunit.xml
 playwright.config.ts
-setup.sh
\ No newline at end of file
+setup.sh
+plantuml_gist.puml
\ No newline at end of file
diff --git a/Diagrams.md b/Diagrams.md
new file mode 100644
index 00000000..a9a779e2
--- /dev/null
+++ b/Diagrams.md
@@ -0,0 +1,5 @@
+# Diagrams
+
+Infrastructural overview about the plugin's PHP classes:
+
+![PlantUML class diagram](https://www.plantuml.com/plantuml/proxy?src=https://raw.githubusercontent.com/lloc/multisite-language-switcher/master/plantuml_gist.puml)
\ No newline at end of file
diff --git a/README.md b/README.md
index fc6395e7..20b016f0 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ If you plan to use the GitHub repository on a server, don't forget to run `compo
             the_msls();
         }
         ```
-Review the [Multisite Language Switcher Website](http://msls.co/) for more information.
+Review the [Multisite Language Switcher Website](http://msls.co/) for more information. Some [diagrams](https://github.com/lloc/Multisite-Language-Switcher/blob/master/Diagrams.md) are also available. 
 
 ## Acknowledgements
 
diff --git a/composer.json b/composer.json
index 5f315ca2..64f41aca 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,8 @@
     "antecedent/patchwork": "^2.1",
     "squizlabs/php_codesniffer": "^3.9",
     "phpcompatibility/php-compatibility": "^9.3",
-    "wp-coding-standards/wpcs": "^3.0"
+    "wp-coding-standards/wpcs": "^3.0",
+    "smeghead/php-class-diagram": "^1.3"
   },
   "autoload": {
     "psr-4": {
@@ -41,6 +42,7 @@
     "prepare": "wget -O build/translations.json http://api.wordpress.org/translations/core/1.0/",
     "flags-png": "php bin/flags-png.php > flags/flags.php",
     "flags-svg": "php bin/flags-svg.php > css/flags.php",
+    "diagram": "vendor/bin/php-class-diagram --php7 includes > plantuml_gist.puml",
     "githooks": [
       "if [ -e ./githooks/pre-commit ]; then cp ./githooks/pre-commit ./.git/hooks/; fi",
       "if [ -e ./.git/hooks/pre-commit ]; then chmod 0755 ./.git/hooks/pre-commit; fi"