this event is now referred to as the last ball of the empire.

in 1914 the ministry of finance transferred the island to the navy, that supervises and controls access to this cultural complex.  the island is accessible by land via a causeway connecting it to the city, at the navy base near praça xv.     

ilha fiscal can be seen on this google map, and here on a wikimapia (zoom setting may open correctly only with chrome or firefox).