…that in the 16th century an execution place was to be found on the spot where the City-Gallery was built? As late as in 1683 18 cases of malefic beings were listed that had been executed by sword?

The quick decapitation was classified as privilege, that were reserved to distinguished capital criminals. Whereas deaths by hanging or wheels were determined as disgraceful death penalties. This was the reason that glallows and wheels were put on different execution places.