William Douglas Caroe (1857 – 1938) was a British architect, particularly of churches. His sons were the architect A. D. R. Caroe, and Sir Olaf Caroe. The firm he founded, Caroe & Partners, still flourishes, specialising in ecclesiastical architecture, especially the restoration of historic churches. His own country house, “Vann” in Surrey, was featured on the TV series The Curious House Guest in 2006. “Vann” is open on National Gardens Scheme days and by appointment.