"During the 15th century educated Italians such as Alberti and Lorenzo Valla (1407–57), who were attuned to the superior decorum of all things Classical, began to use the adjective ‘Gothic’ to convey their sense of contemporary architecture as rough, rustic or crude, by comparison with that of ancient Rome."
ソースは大きな大学図書館などでは大抵はいっている美術事典(のオンライン版)です:
The dictionary of art / editor, Jane Turner ; consulting editor, Hugh Brigstocke ; editorial advisory board, Terukazu Akiyama ... [et al.] ; : set - 34. - London : Macmillan. - New York : Grove's Dictionaries , c1996. - 1996.