Question: What mosaic inside the main church of Florence is attributed to Gaddo Gaddi?

Related documents: [0]  [DOC] The Cattedrale di Santa Maria del Fiore (] ; in English "Cathedral of Saint Mary of the Flower") is the main church of Florence, Italy. Il Duomo di Firenze, as it is ordinarily called, was begun in 1296 in the Gothic style with the design of Arnolfo di Cambio and completed structurally in 1436 with the dome engineered by Filippo Brunelleschi. The exterior of the basilica is faced with polychrome marble panels in various shades of green and pink bordered by white and has an elaborate 19th-century Gothic Revival façade by Emilio De Fabris. [END] 
[1]  [DOC] Gaddo Gaddi (c. 1239, Florence – c. 1312, Florence) was an Italian painter and mosaicist of Florence in a gothic art style. Almost no works survive. He was the father of Taddeo Gaddi. He completed mosaics on facade of Santa Maria Maggiore in Rome. The "Coronation of the Virgin" mosaic over the inside door of Florence Cathedral, dated 1307, is also attributed to Gaddo Gaddi. [END]  
Answer: Coronation of the Virgin
Coronation of the Virgin