a custom which was new in Venice, in which the doge conferred one fourth of his personal assets to his wife; Venice had confiscated Pietro's freehold estates). Waldrada issued a receipt (carta securitatis) to the new doge and the Venetian people. Marina married Tribuno Memmo, who was doge in 979–991. References Sources Bertolini, Margherita Giuliana, Dizionario Biografico degli Italiani - Volume 17 Cessi, Roberto (ed), Le origini del ducato veneziano, 1951 pp. 99–142. Cessi, Roberto, Pacta Ottoniana, in Le origini del ducato veneziano, 1951, pp. 309–13 Cessi Roberto, Venezia ducale, I, Duca e popolo, Venezia 1963, pp. 256 n. 1, 288–293, 321–333, 338 s., 340, 343; Vol II, pp. 166, 190 n. 78 Edgcumbe, Staley: The dogaressas of Venice : The wives of the doges Fanta, A., Die Verträge der Kaiser mit Venedig bis zum Jahre 983, in Mittheilungen des Instituts für österreichische Geschichtsforschung, Supplement I, 1885, pp. 97 s., 101 Lanfranchi L, G. Zille G., Ilterritorio del ducato veneziano dall'VIII al XII secolo, in Storia di Venezia, II, 1958, pp. 6, 46; Luzzatto G, L'economia veneziana nei suoi rapporti con la politica nell'Alto Medio Evo, pp. 157 Mor, Giulio Carlo, L'età feudale, I-II, 1952 Norwich, John, Julius, A History of Venice, Penguin Book, reissued edition, 2012 976 deaths 10th-century Doges of Venice Candiano family Year of birth unknown