The Old Den (known while in use as the Den) was the fifth football stadium occupied by Millwall F.C. in Cold Blow Lane, New Cross, London since their formation in Millwall on the Isle of Dogs in 1885 before moving to the New Den (now called the Den), in May 1993. The ground opened in 1910 and was the home of Millwall for 83 years. It boasted a record attendance of 48,672 (v Derby County in 1937).