Gosh, I promise I have been in that same exact spot as the pic taken.
FMI, W&J Coppini & Co are some financial services, with 4 different offices around Malta. That one is clearly the one in Valetta.
My uncle also went to Malta a long time ago, and he went via Palermo, so there should probably still be direct flights from Palermo to Valletta. If they went by ferry, then it is another chance. Mediterranean legs <3