This could well be the film with the longest title ever. I have submitted it to a few databases, based on what I see/read in my copy (a compilation of Fernando Birri's oeuvre was edited in Argentina, with all his films, except "Org"). A few moderators asked for proof to accept it, and when I submitted video captions it was finally listed as an "alternate title" or simply deleted. In any case, the long title means "True story of the first foundation of Buenos Aires, as well as of several navigations to many unknown places, kingdom islands, and also of many perils, fights and skirmishes, on land and by the sea, that have never been described in other stories or chronicles, extracted from the book «Travels to the River of La Plata», an original by German soldier Ulrico Schmidl, member of the expedition captained by Don Pedro de Mendoza, who for the first time published these memoirs, properly written down for the public good in the city of Francfort in the year 1567".