A bit more info on the UT:
III - Schole: all economic units passively generate +10% gold when dropping resources on buildings nearby monasteries. The economic building needs to be at least 3 tiles close to the monastery.
Cost: 300 wood 300 stone, 30 seconds
Description: the school of arts and trades were basically corporations of specific artisans or people coming for a particular geographic location, like the inhabitants of Murano and their glass artisans, or the schiavoni, the inhabitants of the venetian Dalmatia. Those corporations often were centered around the church of their saint patron, and often taxed their members for various reasons, like supporting members with difficulties or paying for expenses of the church and various pieces of arts. By the 1500 those corporations were regulated by the government andwere very rich and prestigious. They often lended forced loans to the government in times of war or other crisis.
IV - Schiavona: infantry units have +30 HP.
*Champions would have 100 HP, halberdiers 90 HP, and condottieri 110 HP.
Cost: 600 food and 300 gold, 40 sec
Description: the schiavona was a heavy basket-hilted sword, that protected the user hand. But in general, this UT is to represent the use of venetians heavy armored infantry. Such armor was often heavy and the government itself payed for much of such armor, in order to arm the sailor and rowers when there was boarding actions. On land, in time of crisis such armor was also lenf to citizens, that supported the more professional condottieri armies, that were also heavily armored.