Since the idea was put forward by the German art historian, Friedrich Rintelen in 1912, many scholars have expressed doubt that Giotto was the author of the Upper Church frescoes.
Që kur ideja u pohua nga historiani gjerman, Friedrich Rintelen në 1912, shumë studiues kanë shprehur dyshime rreth faktit nëse Giotto ishte autori i afreskeve të Bazilikës së Sipërme.