This year our friends at Art21 are celebrating the big 100–that’s how many artists have appeared to date on its PBS Series Art in the Twenty First-Century, first broadcast in 2002. From Richard Serra talking tools in his Manhattan studio (from 2000, below) to Sarah Sze (artist #100, she’ll represent the United States later this year at the Venice Biennale) on the importance of improvisation and spontaneity during her installation process, the profiled artists are celebrated on Art21′s new “100 Artists” page–sortable by artist face, name, or order of appearance on the show. No word yet on who made the cut for season seven, but in the meantime, Art21 promises to release previously unpublished content from its archive as well as new material produced in collaboration with the artists–think films, interviews, artworks, and reading lists–throughout 2013.