"Can I geek out for a second?" Maggie Villegas asks, grabbing a pile of old photographs. It's the last Sunday in November and she's in a basement workroom at the School 33 Art Center surrounded by piles of papers, slide sheets, stacks of photographs, posters, and various ephemera documenting 40 years of public murals in Baltimore. As the public art project specialist for the Baltimore Office of Promotion and the Arts, she's in charge of the Baltimore Mural Program. Since starting in March 2014, she's been digging through her office archives and reaching out to participating artists and previous administrators to get a sense of the program's history and discovered that today's mural program grew out of one started in the 1970s called Beautiful Walls for Baltimore. After flipping through a few stacks of photos, she pulls out the reference image for one of the more beloved murals from that era: James Voshell and Pontella Mason's 'The Checker Players,' which was painted on a building near the intersection of Edmondson Avenue and Franklin Street that has since been destroyed.