On "Mound B" in Soba lay the standalone complex of the three churches "A", "B" and "C". Churches "A" and "B", both probably built in the mid-9th century, were large buildings, the first measuring and the second . Church "C" was much smaller and built after the other two churches, probably after 900. The three churches had many similarities, including having a narthex, wide entrances on the main east-west axis and a pulpit along the north side of the nave. Differences are evident in the thickness of the bricks used. Church "C" lacked outer aisles. It seems probable that the complex was the ecclesiastical center of Soba, if not the entire kingdom.