Empire was never an important concept in Ottoman politics. This did not stop Ottoman rulers from laying claim to three titles that may be called imperial: halife, hakan, and kayser. Each of these pertains to different translationes imperii, or claims of descent from different empires: the Caliphate, the steppe empires of the Huns, Turks, and Mongols, and the Roman Empire. Each of the three titles was geared toward a specific audience: Muslims, Turkic nomads, and Greek-Orthodox Christians, respectively. In the nineteenth century a new audience emerged as an important source of political legitimacy: European-emergent international society. With it a new political vocabulary was introduced into the Ottoman language. Among those concepts was that of empire, which found its place in Ottoman discourse by connecting it with the existing imperial claims.