Rectors and rectorates in politics and administration included:
Rector provinciae was the Latin generic term for Roman governor, the governor of a Roman province, known after the time of Suetonius, and specifically a legal term (as used in the Codices of the Emperors Theodosius I and Justinian I) after Emperor Diocletian's Tetrarchy (when they came under the administrative authority of the Vicarius of a diocese and these under a Pretorian prefect), regardless of what their specific titles (of different rank, such as Consularis, Corrector provinciae, Praeses and Proconsul) may have been.
A similar gubernatorial use or as Chief magistrate existed in the Republic of Ragusa (presently Dubrovnik, Croatia), which was governed by a Rector (also used in the Italian form Rettore and the Slavonic equivalent Knez):
The seat of the rector was the Rector's Palace, Dubrovnik.
Primo Rettore, from 8 September 1920 to 29 December 1920, was the title of Gabriele D'Annunzio when he created the Italian Regency of Carnaro
Harris, Robin: Dubrovnik: A History, London, 2003.