1 Exemplar, pattern, prototype, or original work serving as a model after which a building or buildings are copied.
2 Something exemplifying the ideal characteristics of, say, a temple, so some would hold that the Parthenon is the very type of a Greek Doric temple.
4 Top of a small cupola or turret, e.g. the crowning part of a Tudor turret, such as those of the White Tower, Tower of London (1532).
5 Form or character that distinguishes a class or group of buildings (building-type), e.g. church, mausoleum, town-hall, temple.