In the Middle Ages, Mosta was a small hamlet amongst a number of other hamlets, each sparsely populated. These tiny villages were Raħal Calleja, Raħal Ħobla, Raħal Pessa or Pise, Raħal Sir, Raħal Kircipulli, Raħal Brabar and Raħal Dimech. In the sixteenth century these hamlets decreased in importance and Mosta took its place as the principal village. The Apostolic Visit of Mgr Pietro Dusina in 1575 indicated that even the church dedicated to the Assumption that stood in Mosta was so important in the area that it was erroneously called ‘parochial church’. In this year there were 580 persons living in Mosta.