The Italian Gothic style was cultivated as a rule principally by members of the order or men under their influence .
The Italian Gothic style 's earliest important monument is the great convent church at Assisi ( built 1228 -- 53 ) .
The Italian Gothic style , whose earliest important monument is the great convent church at Assisi ( built 1228 -- 53 ) , was cultivated as a rule principally by members of the order or men under their influence .