both the pilasters and archivolts and the spaces of wall and vaulting between them and the pilasters of the smaller orders and ribs which spring from them. The proper and impressive massiveness of the essentially Byzantine system employed is thus contradicted by an apparent skeleton of classic orders simulating an organic structural scheme which has no real existence.
Fig. 37. — Plan of San Biagio.
The exterior of this monument (Fig. 35) has much merit in its general form and proportions. The great central square mass, visible from the ground upward, gives the sense of support for the dome which the eye demands, and the apses with their half-domes are effectively grouped in subordination to the crowning feature. But this merit, which Todi shares with many other buildings of the Renaissance, is primarily due to the Byzantine scheme adopted, and cannot, therefore, be wholly credited to the Renaissance architect.
A variation of this scheme occurs in the church of San Biagio
