Apulum was a fort in the Roman province of Dacia in the 2nd and 4th centuries AD, located in today's Alba-Iulia, Romania.[6] It is the largest castrum located in Romania, occupying 37.5 hectares (93 acres) (750 x 500 m2).
^Constantin C. Petolescu: Dacia – Un mileniu de istorie, Ed. Academiei Române, 2010, ISBN978-973-27-1999-2
^Academia Română: Istoria Românilor, Vol. 2, Daco-romani, romanici, alogeni, 2nd. Ed., București 2010, ISBN978-973-45-0610-1
^ ab"1026.01". National Archaeological Record of Romania (RAN). ran.cimec.ro. 2010-10-22. Archived from the original on 2013-12-19. Retrieved 2012-12-30.