Seite - 359 - in Jacopo Strada and Cultural Patronage at the Imperial Court - The Antique as Innovation, Band 1

359Projects for Emperor Ferdinand i and the design for a palace for a prince ‘in the manner of a fortress’, again in Serlio’s Sesto Libro [Fig. 6.23].33 It will be possible to cite similar correspon- dences in other elements of this and of other buildings discussed in this study. In addition, the basically sober, unornamented architecture seems to own something to the quite functional designs in Serlio’s ‘Eighth’ book. This was a project converting Polybius’s description of a Roman castra, an army camp, into a permanent military settlement, a fortified garrison town. This in itself may have appealed to Ferdinand and Maximilian: Vienna was after all not only an Imperial residence, but also the most important citadel against the Turks, and the Hofburg itself an essential part of its fortifications, as had been proved in 1527 and would be proved again in 1683.34 The choice for heavy, rusticated quoins on the outside corners, as in Serlio’s ‘Palazzo per un principe a modo di fortezza’, noted above, reflects this preoccupation [Fig. 6.23]. In Serlio’s Eight book, the plan and courtyard elevation of the foro or forum, one of the public buildings of his ideal garrison city, may have served as a source of inspiration [Figs. 6.25–6.26]. 33 GIULIO ROMANO 1989, pp. 105–112; Sebastiano Serlio, Sesto Libro, Project xviii, ms. München, bsb, Cod. Icon. 189, fols. 18v. and 18a–r., ‘Della casa del principe a modo di fortezza’. 34 In addition, there may have been symbolic reasons to maintain the castle-like character of the Hofburg, cf. Müller 2000. Figure 6.�� The Stallburg, corner at the Josefsplatz and the Bräunerstraße. Figure 6.�4 Giulio Romano, Palazzo Adimari-Salviati, Rome, detail; from Paul Letarouilly, Les Edifices de Rome moderne, 1857. Figure 6.�3 Sebastiano Serlio, Sesto Libro, project xviii, ‘Della casa del principe a modo di fortezza’, detail; Munich, Bayerische Staatsbibliothek.