Giorgio Vasari

This design with a roundel representing the Trinity in the middle must record the upper register of an altarpiece, possibly depicting an Assumption of the Virgin.  Stylistically, the drawing is very close to Vasari's graphic style and the elaborate composition is also similar to a number of the master's schemes, in which architecture, sculpture and painting merge seamlessly into a unified whole.  There are several examples of the Assumption and Coronation of the Virgin in Vasari's oeuvre, and he frequently incorporated tondi into his monumental altarpiece compositions in Arezzo and Florence.¹ 

1. See for instance F. Härb, The drawings of Giorgio Vasari (1511-1574), Rome 2015, pp. 490-494, nos. 318-321, reproduced and pp. 526-527, no. 347, reproduced