Looking at this picture [1] of Bologna’s skyline from the sixties it seems it could be pretty realistic. The skyline has changed drastically and now you have many more tall buildings that make the remaining tower seems shorter. Also, I think the strangeness of the picture is due to the number of towers, but afaik there were around 100 towers in the city in the 13th century.
[1] https://it.m.wikipedia.org/wiki/Torri_di_Bologna#/media/File...