Unique technical monuments, which were previously inaccessible to visitors, are presented in the attic.
Speaking of the monuments, we have to mention a giant tread-wheel from the 17th century, six cranes (including at least one from the turn of the 17th and 18th centuries) and turnstiles (treadmills), bender, or equipment for material processing. The Basilica was constructed with innovative devices used to, for example, pull building materials and wooden elements of the rafter framing. The unique collection is the oldest set of technical devices in Poland and one of the oldest in Europe.
The listed technical monuments have not been preserved so far. The most interesting device – tread-wheel – was on the verge of collapse (the wooden structure of the crane wheel was heavily tilted). Some of the devices were heavily corroded. The renovated monuments will be made accessible to visitors along with the entire attic of the Basilica.
