Infrared analysis reveals significant pentimenti throughout, with stylistic parallels to those in Leonardo's Portrait of a Woman in Profile in Windsor Castle;

红外线解析将油画的创作线条全部展示出来，在格式上与在温莎城堡达芬奇所作的一个女人画像的轮廓一样；

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Today visitors can see sections of Gaddi's preparatory underdrawing, and some of the artist's pentimenti, or self-corrections, including a now-diaphanous tree used to cover up a misplaced sign.

WSJ: A Heavenly View From On High | Basilica of Santa Croce | Agnolo Gaddi | By Francis X. Rocca