Heshiiska waxaa la saxiixay Spain, 2 July 1494, iyo Portugal, 5 September 1494. Dhinaca kale ee adduunka waxaa loo qaybiyay dhowr sano ka dib Heshiiskii Zaragoza, oo la saxiixay 22 April 1529, kaas oo qeexaya antimeridian ee khadka kala soocida ee lagu qeexay Heshiiskii Tordesillas. Asalka labada heshiis waxaa lagu hayaa General Archive of the Indies ee Spain iyo Torre do Tombo National Archive ee Portugal. Heshiiskan waxaa ilaalin lahaa Spain iyo Portugal si fiican, in kasta oo ay jaahilnimo weyn ka qabaan juqraafiga Dunida Cusub; si kastaba ha noqotee, waxay ka reebtay dhammaan dalalka kale ee Yurub. Kuwaas guud ahaan way iska indha tireen heshiiska, gaar ahaan kuwa noqday dib-u-habeynta Protestantka Su'aal: Goorma ayey Portugal saxiixday heshiiska?
5kii Sebtembar 1494