A recording, a score, and a portrait 
One of the projects I'm working on is to provide good media packets for composers and songwriters. This involves cross-project collaboration between Commons, English Wikisource, and English Wikipedia.
The overall idea is to provide useful illustrative media that migrates easily between different language editions of Wikipedia. It's easier to translate a caption than an entire article, so smaller language projects gain an easy way of providing useful content to their readers. With good restored examples of a recording, a score, and a portrait it's possible to convey a lot of information about a composer even if an article is a stub. I'm working with a team of people and so far we've completed media packets for Ludwig van Beethoven, Irving Berlin, Carlos Gardel, and Scott Joplin. We'd like to do as many as possible and welcome international material.