Ottoman Empire: Polity Style: 1453-1922 - Archontology
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Ottoman Empire: Polity Style: 1453-1922

29 May 1453 conquest of Constantinople (now Istanbul) [1]
29 May 1453 - 4 Nov 1922 Devlet-i Osmaniyye | Ottoman State [2][3]
2 Nov 1922 Grand National Assembly is declared to be the sole state authority of Turkey and successor to the Ottoman imperial house, thus derecognising the authority of the ruler of the Ottoman Empire retroactively from 16 Mar 1920, in accordance with a resolution of the Assembly passed between 03:00 and 06:40 2 Nov 1922 and dated "1/2 teşrinisani 1338" [1/2 Nov 1922] (TBMM Proceedings, term I, 313-316; TBMM Laws, 1:487-488)
4 Nov 1922 collapse of Ottoman government in Constantinople

[1] Taken as notional date for the beginning of the polity style.
[2] Osmanlı Devleti in modern Turkish.
[3] Most common term of reference, not fixed by legislative acts, but used in the Constitution of 1876.