The Pittsburgh Penguins are a professional ice hockey team based in Pittsburgh, Pennsylvania. They are members of the Atlantic Division of the Eastern Conference of the National Hockey League (NHL). The franchise was founded in 1967 as an expansion team during the league's original expansion from six to twelve teams. The Penguins have played in Mellon Arena since their first season, and will move into their new arena, Consol Energy Center, in time for the 2010-11 NHL season. They have won three Stanley Cup championships in their history, in 1991, 1992, and 2009. They have a long-standing rivalry with trans-Pennsylvanian team the Philadelphia Flyers and have a developing rivalry with the Washington Capitals.