In Autumn 2023, wide-area rescue excavation studies were commenced at 18 Sukiennicza St. in Gdańsk in the location of an early medieval hillfort and a burial site, and a Teutonic Knights castle from a later date. In the course of the excavations, wooden structures of the hillfort have been unearthed, comprising dwelling buildings, utility structures, and a network of streets. A particularly notable structure is a large, durable wooden building in Greek-cross plan discovered on the premises of a skeleton burial site. According to initial suspicions, it is a hillfort church known from written sources. The preserved distinction between the area of the daily life in the hillfort – the sphere of the profane – and the sphere of the sacred suggests that the building fulfilled religious functions. The presence of the church on the hillfort premises is the sole identifiable symbol of the Piast rule over the residents and the area in the 12th-century Gdańsk that has been discovered so far.