Extended usefull links

Useful-Resources.md

@@ -6,13 +6,37 @@ Where we can link to other free culture sites that provide useful services.
 
 ## Images
 
-- [Openverse](https://openverse.org/) is a tool that allows openly licensed and public domain works to be discovered and used by everyone.
+[Open Clipart](https://openclipart.org) 
-- [Logos](https://www.logo.wine/) Images are open, but the logos are trademarked.
+Is an online media collection of more than 160 000 vectorial graphics, entirely in the public domain.
-- [Open Clipart](https://openclipart.org) is an online media collection of more than 160 000 vectorial graphics, entirely in the public domain.
-- [The Font Library](https://fontlibrary.org) Unless otherwise noted, fonts on this site are published under Creative Commons Attribution-ShareAlike.
-- _[Pixabay](https://pixabay.com) is a vibrant community of creatives sharing royalty-free content - some Creative Commons content._
 
-## Audio
+[The Font Library](https://fontlibrary.org) 
+Unless otherwise noted, fonts on this site are published under Creative Commons Attribution-ShareAlike.
+
+[Pixabay](https://pixabay.com)
+A vibrant community of creatives sharing royalty-free content - some Creative Commons content.
+
+[Public Domain Image Archive](https://pdimagearchive.org/)
+The Public Domain Image Archive (PDIA) — brought to you by The Public Domain Review (PDR) — is a curated collection of more than 10,000 out-of-copyright historical images, free for all to explore and reuse
+
+[Openverse](https://openverse.org/)
+All Openverse content is under a Creative Commons license or is in the public domain.
+
+[Wellcome Collection](https://wellcomecollection.org/)
+Unless otherwise stated, content on the Wellcome website is © The Wellcome Trust and is licensed under a Creative Commons Attribution 4.0 International (CC-BY 4.0) licence.
+
+[Digital Bodleian](https://digital.bodleian.ox.ac.uk/)
+Enable viewing and download of highest-quality resolution images for the purposes of non-commercial research and teaching
+
+[Getty Open Content Program](https://www.getty.edu/projects/open-content-program/)
+The Open Content Program makes high-resolution images of public domain artwork from the Getty collections freely available, without restrictions, to advance the research, teaching, and practice of art and art history.
+
+[Wikimedia Commons](https://commons.wikimedia.org/wiki/Main_Page)
+Files are available under licenses specified on their description page. All structured data from the file namespace is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. 
+
+[Logos](https://www.logo.wine/) 
+Images are open, but the logos are trademarked.
+
+<!-- ## Audio -->
 
 - [Freesound](https://freesound.org/) aims to create a huge collaborative database of audio snippets, samples, recordings, bleeps, ... released under Creative Commons licenses that allow their reuse. 
 - [LibriVox](https://librivox.org/) Objective, To make all books in the public domain available, narrated by real people and distributed for free, in audio format on the internet.
@@ -23,4 +47,6 @@ Where we can link to other free culture sites that provide useful services.
 
 ## Navigation
 
-- [openrouteservice](https://openrouteservice.org/) The data sources for routing and mapping are based on free and open and even collaborative volunteered data collection efforts.
+- [openrouteservice](https://openrouteservice.org/) The data sources for routing and mapping are based on free and open and even collaborative volunteered data collection efforts.
+
+