Complaints have been not infrequent of late years that the history of the Italian Renaissance is a subject that is worn rather threadbare. So far as popular and picturesque writing is concerned there may be some truth in this complaint, but it can hardly apply to serious studies, and it certainly does not apply to one branch of the subject, the history of the revival of the national style of architecture in Italy in the first half of the fifteenth century. Due homage has, indeed, been paid to the genius which raised aloft the splendid dome of S. Maria del Fiore, and the history of that achievement has, I believe, been thoroughly investigated. But Brunellesco was something more than an engineer, and the history of his purely architectural works, so remarkable for their severe and noble style, seems not unworthy of being studied in the same spirit and with the same scientific method as the Gothic architecture of the north. Nor are the buildings of Alberti, Antonio di San Grallo, Bramante, and other early architects less worthy of antiquarian research, and much of their history remains very obscure.