The City Council last week endorsed to an Arts Commission concept plan to install a unique historical marker commemorating the former site of Mirage Studios, the comic book studio that created the Teenage Mutant Ninja Turtles (TMNT) in Dover in November 1983. The Arts Commission endorsed the concept plan at its June 7 meeting. The concept plan calls for the historical marker to be incorporated into a custom-designed maintenance hole cover in front of the lot where Mirage Studios was founded on Union Street. The idea to create art and a historical marker on a maintenance hole cover was envisioned by resident James Lane who proposed it to the Arts Commission. “Most storylines in TMNT comics take place in the sewer, making this unusual location relevant,” Lane wrote his Arts Commission proposal.