A church building, often simply called a church, is a building used for religious activities, particularly worship services. The term in its architectural sense is most often used by Christians to refer to their religious buildings; they can be used by other religions. In traditional Christian architecture, the church is often arranged in the shape of a Christian cross. When viewed from plan view the longest part of a cross is represented by the aisle and the junction of the cross is located at the altar area.

The Church Building is located at the corner of Main and Market Streets in downtown Poughkeepsie, New York, United States, just across Market Street from the Dutchess County Court House, and north of the Bardavon Theater. It is a complex of stores and other commercial space, so named because it is owned by the Reformed Dutch Church of Poughkeepsie, which has owned the land since 1717 and benefits from the rental income. It was the western anchor of Main Mall, the city's former pedestrian mall.