From early medieval stone to later rebuilds
The stone church phase is dated to the late 11th century and early 12th century. Around the turn of the 14th-15th century, the building entered a major rebuilding phase that shaped the later structure visitors recognize today.
How the square changed around the church
Over time, the level of Rynek Główny rose by roughly 2-3 m (6.6-9.8 ft), while the church kept its older footprint. The dome is dated to 1611, and another major renovation followed around 1711, so the building records several city eras in one compact form.
What sits below today's floor level
Archaeological campaigns in the 1950s and 1960s uncovered older church layers below current surfaces. In the underground section, you can see remains around 2 m (6.6 ft) below the present floor, which makes the long time depth immediately visible.
What to notice in your first five minutes
Start outside with the low-set church profile against the open square, then step in and compare the intimate interior scale with the busy market space outside. If you keep this contrast in mind, even a short stop feels surprisingly rich and memorable.