Anthrocon (abbreviated as AC) is the world's largest furry convention, taking place in Pittsburgh, Pennsylvania each July. Its focus is on furries: fictional anthropomorphized animal characters in art and literature. The convention was first held in 1997 in New York State.
Founded in 1997 as Albany Anthrocon (AAC) in New York State, with a membership of about 500, the convention moved to Valley Forge, Pennsylvania in 1999 and to a larger hotel, the Adams Mark, on the outskirts of Philadelphia in 2001 as its attendance continued to grow. Membership in 2003 was announced as 1,949. In 2004 it was 2,406, making it by far the largest furry convention at that time. Attendance in 2005 dropped slightly to 2,373, due in part to higher parking fees, a different and unfamiliar hotel (the Wyndham Franklin Plaza in downtown Philadelphia), and possibly due to Hurricane Dennis's effect on the southern United States which closed many airports and prevented people from traveling.
Due to the unforeseen sale of the Adams Mark Hotel in November 2004, Anthrocon chose the Wyndham Franklin Plaza in Philadelphia as the site for its 2005 convention. In June 2005, a contract with the Westin Convention Center Hotel in Pittsburgh was signed, and Anthrocon was scheduled to be held at the adjoining David L. Lawrence Convention Center between June 15-18, 2006. Despite concerns that the move to Pittsburgh and temporary date shift would decrease attendance, it actually rose to 2,489, which was enough to ensure the future of the convention for July 5-8, 2007.