As a youth he attempted everything, being of a pertinacious and inquiring mind, and he was also a great debater and student of Dante; and, taking to sculpture, he was one of those who, as we shall see in a later chapter, competed for the commission for the Baptistery gates.

It was indeed his failure in that competition which decided him to concentrate on architecture.

That he was a fine sculptor his competitive design, now preserved in the Bargello, and his Christ crucified in S.Maria Novella, prove; but in leading him to architecture the stars undoubtedly did rightly.
It was in 1403 that the decision giving Ghiberti the Baptistery commission was made, when Brunelleschi was twenty-six and Donatello, destined to be his life-long friend, was seventeen; and when Brunelleschi decided to go to Rome for the study of his new branch of industry, architecture, Donatello went too.

There they worked together, copying and measuring everything of beauty, Brunelleschi having always before his mind the problem of how to place a dome upon the cathedral of his native city.

But, having a shrewd knowledge of human nature and immense patience, he did not hasten to urge upon the authorities his claims as the heaven-born architect, but contented himself with smaller works, and even assisted his rival Ghiberti with his gates, joining at that task Donatello and Luca della Robbia, and giving lessons in perspective to a youth who was to do more than any man after Giotto to assure the great days of painting and become the exemplar of the finest masters--Masaccio.
It was not until 1419 that Brunelleschi's persistence and belief in his own powers satisfied the controllers of the cathedral works that he might perhaps be as good as his word and was the right man to build the dome; but at last he was able to begin.