A church porch is a room-like structure at a church's main entrance. A porch protects from the weather to some extent. Some porches have an outer door, others a simple gate, and in some cases the outer opening is not closed in any way. The porch at St Wulfram's Church, Grantham, like many others of the period, has a room above the porch. It once provided lodging for the priest, but now houses the Francis Trigge Chained Library. Such a room is sometimes called a parvise which spelt as parvis normally means an open space or colonnade in front of a church entrance.