Giotto: Nativity

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Frescoes at the Cappella degli Scrovegni in Padua, by Giotto di Bondone (c. 1267 – January 8, 1337). Left: Joachim's Dream. From Wikipedia:

Giotto's masterwork is the decoration of the Scrovegni Chapel in Padua, commonly called the Arena Chapel, completed around 1305. This fresco cycle depicts the life of the Virgin and the life of Christ. It is regarded as one of the supreme masterpieces of the Early Renaissance. That Giotto painted the Arena Chapel and that he was chosen by the commune of Florence in 1334 to design the new campanile (bell tower) of the Florence Cathedral are among the few certainties of his biography. Almost every other aspect of it is subject to controversy [...]

Joachim's Dream [detail].