The Washington Window, containing the Heraldic arms of the Washington family, is to be found in the south clerestory window of the choir and is the original fourteenth century glass. When Glover the Herald visited Selby in 1584-5 he described the escutcheon as 'Argent, two bars and in chief three mullets pierced, gules'.
The 14th century Washington coat of arms contains three stars above red and white stripes, and is one of the first known representations of the stars and stripes pattern later used for the US flag. The window is thought to commemorate John Wessington, Prior of Durham (1416-1446).
Because the Washington connection, Selby Abbey is on the 'American Trail' of attractions around the UK with strong American historical connections.