evidence: In 1952, the Colombian president in charge, Roberto Urdaneta Arbeláez, through his foreign minister Juan Uribe Holguín, in response to a claim by Venezuela, recognized Venezuelan sovereignty over Los Monjes[6][7] through a diplomatic note[8] (GM-542): "The Government of Colombia declares that it does not object to the sovereignty of the United States of Venezuela over the Los Monjes Archipelago and that consequently it does not object to the exercise of that sovereignty, or to any act of claim that it may make with respect to the exercise of that sovereignty, or to any act of domination by that country over the archipelago in question." [...] On March 31, 1978, the Maritime Boundary Treaty between the Netherlands and Venezuela was signed, establishing the maritime border between Venezuela and the island of Aruba, which at that time belonged to the Netherlands Antilles, using the Los Monjes archipelago as a reference base.