this bug has been submitted to 2K, but posting it here so that its also attested to. The wonder description states "When the Torre de Belém is constructed, cities not on your home continent receive the lowest Production Production cost building they can currently construct." It actually appears that the wonder only grants city centre buildings. However this does not seem to be intended behaviour. Played a Dido game, figured they were a fun Civ to maximise on this wonder. did some testing myself. you can complete belem in city Lpqy with either Eiffel GP or builder chops. phoenicia capital recently moved to kernorland, all other cities on different continents. every city has its lowest production cost building in its queue. When the wonder is completed all production queues are emptied but only the building in MotupŌhue (a granary) completes for free.