Seven Kingdoms: Seowyn's Crossing
A church is a structure with a religious dedication. It is a larger structure than a Shrine but smaller than a Temple. A church can be dedicated to a single deity or an entire pantheon. Churches that’re dedicated to an entire pantheon often hold small shrines to individual deities.
A church is almost always headed by a simple priest. Often this individual is little more than elder of the community who has inherited a modest ritual book.