In architecture, and specifically Gothic architecture, a gargoyle is a carved or formed grotesque with a spout designed to convey water from a roof and away from the side of a building, thereby preventing it from running down masonry walls and eroding the mortar between. Architects often used multiple gargoyles on a building to divide the flow of rainwater off the roof to minimize potential damage from rainstorms. A trough is cut in the back of the gargoyle and rainwater typically exits through the open mouth. Gargoyles are usually elongated fantastical animals because their length determines how far water is directed from the wall. When Gothic flying buttresses were used, aqueducts were sometimes cut into the buttress to divert water over the aisle walls.

Saint Romanus of Rouen was a scribe, clerical sage, and bishop of Rouen. He would have lived under Dagobert I (629–39), though his date of birth is unknown. His life is known in legend and tradition and is shown in the stained glass windows and south gate of Rouen Cathedral and the stained glass windows of the église Saint-Godard (1555). The Catholic Encyclopedia claims that his legend has little historical value with little authentic information. He was both Lord Chancellor of France and Référendaire of France..