Bell roof

A bell roof (bell-shaped roof, ogee roof, Philibert de l'Orme roof) is a roof form resembling the shape of a bell.

Shapes
Bell roofs may be round, multi-sided or square. A similar-sounding feature added to other roof forms at the eaves or walls is bell-cast, sprocketed or flared eaves, the roof flairs upward resembling the common shape of the bottom of a bell.