BRITAIN AND FRANCE. l6TH TO l8TH CENTURY were called later on, were never clearly defined. Michelangelo had been Superintendent of the Papal Buildings; but nobody would have considered such an appointment a full-time job. Now the architectural office developed, and a system of training at the draw- ing board and on the jobs. Jules Hardouin-Mansart (1646-1708) was the perfect type of the official French architect, competent, quick and adaptable. In his church of St. Louis des Invalides (pi. ixxxvn and fig. 86) of 1675- 1706 he achieved, just as Perrault did, that specific combination of grandeur and elegance which is not to be found anywhere outside France. The composition, externally and internally, is meant to be taken as an improvement on Lemercier's Sorbonne and Levau's College des Quatre Nations. The interior, except for the oval chancel, is more academically balanceS, that is less dynamic in its spatial relations, than the works of Hardouin-Mansart's predecessors. But the dome is constructed so that in looking up one sees through a wide opening in the inner cupola on to the painted surface of a second cupok, lit by concealed windows—a wholly Baroque spatial efiect. Examining now the facade one will become aware of its Baroque qualities too, in spite of its seemingly correct portico with Doric and Ionic orders. The free rhythmical spacing of the columns (taken from Perrault) should be noted, and the graded advance in plan towards the centre: first step from the walls to the columns of the wings, second step to the columns on the sides of the portico and third step to the four middle columns. Not only the Greeks but also Palladio and even Vignola'would have deprecated this strongly. Sir Christopher Wren did not. His St. Paul's Cathedral of 1675- 1710 (pi. Lxxxvm and fig. 87) though apparently so much a monu- ment to Classicism is in fact just as much a blend of the classical and the Baroque as the Dome des Invalides. The dome of St. Paul's, one of the most perfect in the world, is classical indeed. It has a more reposeful outline than Michelangelo's and Hardouin-Mansart's. The decoration with a colonnade round the drum is also character- istically different from the projecting groups of columns and broken entablatures of St. Peter's and the segment-headed windows —so remarkably domestic-looking—and the slim, graceful shape of the lantern of St. Louis's. But looking more closely, even there the alternation of bays where columns flank niches, with bays where they stand in front of loggias, introduces an element of unclassical 170