diff --git a/README.md b/README.md
index 75a30bd63..aa96ee0a6 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,6 @@ Fast, automated, modular installation/configuration/maintenance tool for persona
 * [Samba](https://www.samba.org/) file sharing server (public and private file shares)
 * [Apache](https://httpd.apache.org/) [web server](https://en.wikipedia.org/wiki/HTTP_Server) and Web applications:
    - [Nextcloud](https://nextcloud.com/): file/calendar/address book storage, synchronization and sharing, and more.
-   - [MinigalNano](https://github.com/sebsauvage/MinigalNano): simple image gallery.
    - [Shaarli](https://github.com/shaarli/Shaarli): save and share links, bookmarks, notes, and more.
    - [Tiny Tiny RSS](https://tt-rss.org/gitlab/fox/tt-rss/wikis/home): [News feed reader](https://en.wikipedia.org/wiki/News_aggregator) and aggregator (RSS/Atom) + plugins.
    - [Converse.js](https://conversejs.org/): Web chat client (XMPP).
@@ -155,7 +154,6 @@ update-firewall: update firewall rules according to configuration
 update-services: update services status according to configuration
 upgrade: upgrade all software to latest versions
 webapp-conversejs-install: Install converse.js web chat client
-webapp-minigalnano-install: Install MinigalNano image gallery
 webapp-nextcloud-install: Install nextcloud file sharing and collaboration platform
 webapp-shaarli-install: Install Shaarli link sharing service
 webapp-tt-rss-install: Install TT-RSS feed reader
diff --git a/TODO.md b/TODO.md
index 0ac7d4ac0..581934b33 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,11 +3,11 @@
 _Note: more todo-list items can be found with `git grep -r TODO`_
 
  * [bug] converse.js does not work on fresh install (error: require is not defined)
+ * [enh] replace conversejs with modern chat platform (riot/mattrermost/rocket.chat/jsxc/...)
+ * [doc] document installed owncloud apps
 
 #### Security
 
-* [easy] [security] remove minigalnano (unmaintained, security issues: https://github.com/sebsauvage/MinigalNano/issues/123
-
 * [firewall] test that new fail2ban configuration w/ firehol is effective
 * [enh] [security] [firewall] add a mode to restrict services access to VPN only
 * [enh] [security] [firewall] restrictive OUTPUT policy (see firehol.conf)
@@ -158,8 +158,6 @@ _Note: more todo-list items can be found with `git grep -r TODO`_
 * [enh] store installed version number in status file
 * [enh] upgrades: only upgrade when the versions.yml version is > installed version number
 * [enh] report: check backups integrity (https://github.com/bit-team/backintime/wiki/FAQ#id24)
-* [enh] minigalnano: customize titles/author
-* [enh] minigalnano: populate photos directory with one dfeaault picture to prevent "new installation" message from showing
 * [enh] [cli] rename tasks as per TODOs in Makefile
 * [enh] backups: after backup: if configured backup drive is plugged in, display debug message, mount it and sync contents of the backup directory to it
         add doc on preparing the usb drive
diff --git a/roles/webapp-minigalnano/files/etc_apache2_conf-available_minigalnano-password.conf b/roles/webapp-minigalnano/files/etc_apache2_conf-available_minigalnano-password.conf
deleted file mode 100644
index 7f71f60cb..000000000
--- a/roles/webapp-minigalnano/files/etc_apache2_conf-available_minigalnano-password.conf
+++ /dev/null
@@ -1,6 +0,0 @@
-<Directory /images>
-       AuthUserFile /etc/apache2/passwd
-       AuthName "Images"
-       AuthType Basic
-       require valid-user
-</Location>
\ No newline at end of file
diff --git a/roles/webapp-minigalnano/files/var_www_images_config.php b/roles/webapp-minigalnano/files/var_www_images_config.php
deleted file mode 100755
index 7f521af88..000000000
--- a/roles/webapp-minigalnano/files/var_www_images_config.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-/*
- * This file is part of MinigalNano: https://github.com/sebsauvage/MinigalNano
- *
- * MiniGal Nano is based on an original work by Thomas Rybak (© 2010)
- *
- * MinigalNano is licensed under the AGPL v3 (https://gnu.org/licenses/agpl-3.0.txt).
- */
-
-// EDIT SETTINGS BELOW TO CUSTOMIZE YOUR GALLERY
-$thumbs_pr_page = "39"; // Number of thumbnails on a single page
-$gallery_width = "80%"; // Gallery width. Eg: "500px" or "70%"
-$backgroundcolor = "white"; // This provides a quick way to change your gallerys background to suit your website. Use either main colors like "black", "white", "yellow" etc. Or HEX colors, eg. "#AAAAAA"
-$templatefile = "board"; // Template filename (must be placed in 'templates' folder)
-$title = "MiniGal Nano"; // Text to be displayed in browser titlebar
-$author = "John Doe";
-$folder_color = "black"; // Color of folder icons: blue / black / vista / purple / green / grey
-$sorting_folders = "name"; // Sort folders by: [name][date]
-$sorting_files = "date"; // Sort files by: [name][date][size]
-$sortdir_folders = SORT_ASC; // Sort direction of folders: SORT_ASC / SORT_DESC
-$sortdir_files = SORT_DESC; // Sort direction of files: SORT_ASC / SORT_DESC
-$lazyload = 1; // 0 is pagination, 1 is display all pictures on one page
-$skip_objects = array('aFolder', 'aFile.ext'); //Those files and folders will not be displayed (affects the page and the RSS feed)
-
-//LANGUAGE STRINGS
-$label_home = "Home"; // Name of home link in breadcrumb navigation
-$label_new = "New"; // Text to display for new images. Use with $display_new variable
-$label_page = "Page"; // Text used for page navigation
-$label_all = "All"; // Text used for link to display all images in one page
-$label_noimages = "No images"; // Empty folder text
-$label_noimages_advice = "Use SFTP to upload some pictures !";
-$label_loading = "Loading..."; // Thumbnail loading text
-$breadcrumb_separator = ">"; // Breadcrumb parts separator
-
-//RSS SETTINGS
-$description = "MiniGal Nano";
-$nb_items_rss = 100; // Number of elements to display in the feed. If you add a lot of pictures at the time, consider increasing this number
-$rss_refresh_interval = 60;// Time, in seconds, between two RSS refresh. for example, 3600 = 1update max per hour, 86400 = 1/day.
-$keep_extensions = array('jpg', 'jpeg', 'png', 'gif', 'webm', 'mp4', 'ogv'); // Only files with these extensions will be displayed on the RSS feed
-
-//ADVANCED SETTINGS
-$thumb_size 			= 320; //Thumbnail height/width (square thumbs). Changing this will most likely require manual altering of the template file to make it look properly! 
-$label_max_length 		= 40; //Maximum chars of a folder name that will be displayed on the folder thumbnail  
-$display_exif			= 0; //Take care, even if not diplayed EXIF are still readable for visitors. May be a good idea to erase EXIF data...
-$display_filename		= 0; //Show file names below the pictures
-?>
diff --git a/roles/webapp-minigalnano/handlers/main.yml b/roles/webapp-minigalnano/handlers/main.yml
deleted file mode 100644
index 840ca74a3..000000000
--- a/roles/webapp-minigalnano/handlers/main.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-##### MESSAGES
-
-- name: display minigalnano installation completion message
-  debug: msg="MinigalNano successfully installed, available at https://{{ srv01_fqdn }}/images/. Upload your pictures to sftp://{{ srv01_fqdn }}/PUB_IMAGES/"
diff --git a/roles/webapp-minigalnano/tasks/cleanup.yml b/roles/webapp-minigalnano/tasks/cleanup.yml
deleted file mode 100644
index f320b2ae8..000000000
--- a/roles/webapp-minigalnano/tasks/cleanup.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-- name: optimize images
-  shell: find /var/www/images/photos/ -iname "*.{{ item.ext }}" -exec {{ item.tool }} '{}' \;
-  with_items:
-    - { ext: 'png', tool: 'optipng'}
-    - { ext: 'jpe?g', tool: 'jpegoptim'}
-  ignore_errors: True
-
-- name: clear minigalnano thumbnails cache
-  command: find /var/www/images/thumbs -type f -exec srm -llzv '{}' \;
\ No newline at end of file
diff --git a/roles/webapp-minigalnano/tasks/main.yml b/roles/webapp-minigalnano/tasks/main.yml
deleted file mode 100644
index deca22e1d..000000000
--- a/roles/webapp-minigalnano/tasks/main.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-# webapp-minigalnano role
-- name: check minigalnano role installation status
-  stat: path=/var/lib/srv01/minigalnano-installed
-  register: minigalnano_installed
-  tags: 
-    - webapp-minigalnano-install
-    - upgrade
-    - cleanup
-
-# srv01 - webapp-minigalnano-install: Install MinigalNano image gallery
-- name: abort installation when minigalnano is already installed
-  fail: msg="ERROR minigalnano role has already been configured."
-  when: minigalnano_installed.stat.exists == True
-  tags: webapp-minigalnano-install
-
-- include: minigalnano.yml
-  tags: webapp-minigalnano-install
-
-# upgrade only when minigalnano is aleady installed
-- include: minigalnano.yml
-  tags: upgrade
-  when: minigalnano_installed.stat.exists == True
-
-- include: cleanup.yml
-  tags: cleanup
-  when: minigalnano_installed.stat.exists == True
\ No newline at end of file
diff --git a/roles/webapp-minigalnano/tasks/minigalnano.yml b/roles/webapp-minigalnano/tasks/minigalnano.yml
deleted file mode 100644
index 535fbf82c..000000000
--- a/roles/webapp-minigalnano/tasks/minigalnano.yml
+++ /dev/null
@@ -1,80 +0,0 @@
-##### PACKAGES ##### NONE
-
-
-##### CHECK REQUIREMENTS #####
-
-- name: check apache role installation status
-  stat: path=/var/lib/srv01/apache-installed
-  register: apache_installed
-
-- name: exit - apache is not installed
-  fail: msg="Aborting installation - apache role is not installed. Please run 'srv01 apache-install' to install it."
-  when: apache_installed.stat.exists != True
-
-##### DOWNLOADS #####
-
-- name: clone minigalnano
-  git: repo=https://github.com/sebsauvage/MinigalNano
-       dest=/var/www/images
-       version='{{ minigalnano_version }}'
-       accept_hostkey=yes
-       force=yes
-
-##### APACHE CONFIG ##### NONE
-
-##### MYSQL ##### NONE
-
-##### FAIL2BAN ##### NONE
-
-# minigalnano has no password protection mechanism
-# use apache2 password protection to restrict access
-# apache2 auth module has its own fail2ban jail/filter
-
-##### BACKUPS #####
-
-- name: copy minigalnano backup config
-  template: src=etc_rsnapshot.d_minigalnano.conf.j2 dest=/etc/rsnapshot.d/minigalnano.conf mode=0600
-  notify: update backup configuration
-
-##### FILES IN WEBROOT #####
-
-- name: copy minigalnano config
-  copy: src=var_www_images_config.php dest=/var/www/images/config.php
-
-- name: remove system_check.php (php version disclosure)
-  file: path=/var/www/images/system_check.php state=absent
-
-##### FILE PERMISSIONS #####
-
-- name: set minigalnano files ownership to root:www-data
-  file: path=/var/www/images state=directory owner=root group=www-data recurse=yes
-
-- name: ensure files are mode 0640 and directories mode 0750
-  shell: find /var/www/images -type {{ item.type }} -print0 | xargs -0 chmod -c {{ item.mode }}
-  register: chmod_result
-  changed_when: "chmod_result.stdout != \"\""
-  with_items:
-    - { type: 'f', mode: '0640' }
-    - { type: 'd', mode: '0750' }
-
-- name: create thumbs directory with webserver write permissions
-  file: path=/var/www/images/thumbs state=directory owner=www-data group=www-data recurse=yes
-
-# sgid directory: all files created in the photos directory will inherit its group id (www-data)
-- name: set minigalnano photos dir to sgid + owner rw + group r
-  file: path=/var/www/images/photos state=directory owner=root group=www-data mode=2770
-
-- name: set/fix minigalnano image files permissions to owner rw + group r
-  shell: find /var/www/images/photos/ -type f -exec chmod 0640 "{}" \;
-
-##### COMMAND-LINE/MISC INSTALLATION STEPS #####
-
-- name: create symlink to images directory in main users home
-  file: state=link dest="/home/{{ admin_username }}/PUB_IMAGES" src=/var/www/images/photos/ 
-
-- name: create minigalnano-installed status file
-  template: src=var_lib_srv01_minigalnano-installed.j2 dest=/var/lib/srv01/minigalnano-installed owner=root group=root mode=0600
-  notify: display minigalnano installation completion message
-
-#TODO: create a symlink ~/public_images/ -> /var/www/images/photos
-#TODO: cleanup: clear minigalnano cache
diff --git a/roles/webapp-minigalnano/templates/etc_rsnapshot.d_minigalnano.conf.j2 b/roles/webapp-minigalnano/templates/etc_rsnapshot.d_minigalnano.conf.j2
deleted file mode 100644
index 50bc3c021..000000000
--- a/roles/webapp-minigalnano/templates/etc_rsnapshot.d_minigalnano.conf.j2
+++ /dev/null
@@ -1 +0,0 @@
-backup	/var/www/images/		localhost/
diff --git a/roles/webapp-minigalnano/templates/var_lib_srv01_minigalnano-installed.j2 b/roles/webapp-minigalnano/templates/var_lib_srv01_minigalnano-installed.j2
deleted file mode 100644
index b5ad28268..000000000
--- a/roles/webapp-minigalnano/templates/var_lib_srv01_minigalnano-installed.j2
+++ /dev/null
@@ -1 +0,0 @@
-{{ minigalnano_version }}
\ No newline at end of file
diff --git a/site.yml b/site.yml
index a10cad3ab..ff39c683b 100644
--- a/site.yml
+++ b/site.yml
@@ -14,7 +14,6 @@
     - samba
     - transmission
     - mumble
-    - webapp-minigalnano
     - webapp-conversejs
     - webapp-nextcloud
     - webapp-tt-rss
diff --git a/versions.yml b/versions.yml
index af342b7fe..495c6b773 100644
--- a/versions.yml
+++ b/versions.yml
@@ -12,6 +12,5 @@ nextcloud_contacts_version: 'v1.5.3'
 nextcloud_tasks_version: 'v0.9.5'
 # https://github.com/kucrut/ttrss-reader/tags.atom
 ttrss_reader_version: '1.3.0'
-minigalnano_version: 'master'
 tt_rss_version: 'master'
 apaxy_version: 'master'