RENAISSANCE AND MANNERISM C. I42O-C. I6OO with the four bays of aisle along the inner side of the facade. It would all have been exceedingly unusual—a sacrifice to aesthetic consistency and the desire for centralisation. Indeed, during the very year in which Sto. Spirito was begun, Brunelleschi had designed a com- pletely central church, the first of the Renaissance. It is S. Maria degli Angeli (figs. 43 and 44). After three years, in 143 7, the building was dis- continued, and only ground-floor walls now remain. But we can read the plan and compare it with reliable en- gravings taken, it seems, from lost original drawings. S. Maria degli Angeli was to be wholly Roman in character and very massive, the outcome no doubt of a long stay of Brunelleschi in Rome to which we can with a good deal of certainty assign the date 1433. The light, slim columns of the other buildings are here replaced by pilasters attached to solid piers at the eight corners of the octagon. Eight chapels sur- round it, each with niches hollowed out into the thick- ness of the walls. The dome also was to be of one piece in side and out like a Roman dome and not on the Gothic principle of an outer and a separate inner shell, still applied by Brunelleschi to Florence Cathedral. Of Romanesque or Proto-Renaissance con- nections there are here none left. What Roman building in particular inspired Brunelleschi we can no longer say. There were plenty of remains still in existence in the I5th century and drawn by architects, which have now disappeared. 82 J . T 43 AND 44. FILIPPO BRUNELLESCHI: S. MARIA DEGLI ANGELI, FLORENCE, BEGUN 1434.