The date of its original construction is unknown. However, there are claims of prehistoric or classical buildings near the site, due to some large ashlar blocks and an Egyptian pink granite column at the top part of the fort. There is also the mentioning in Roman texts of a temple dedicated to Juno/Astarte, probably in the vicinity of the fort. There is also the popular attribute to its foundation to the Arabs, 870 AD, but nothing is concrete although al-Himyarī mentions that the Arabs dismantled a (fortress), but there is no actual reference if this 'fortress' was in Vittoriosa. Its probable start as a fortification is the high/late medieval period. In fact, in 1220 Hohenstaufen Emperor Frederick II started to appoint his own Castellani for Malta who needed a place to live and secure the