An aisleless church (German: Saalkirche) is a single-nave church building that consists of a single hall-like room. While similar to the hall church, the aisleless church lacks aisles or passageways on either side of the nave and separated from the nave by colonnades or arcades, a row of pillars or columns. However, there is often no clear demarcation between the different building forms, and many churches, in the course of their construction history, developed from a combination of different types.