London Protocol (1830)
In March 1829, the foreign ministers of the Great Powers signed the first London Protocol, according to which Greece would become an autonomous, tributary state under Ottoman suzerainty, under an elected Christian prince and encompassing the heartlands of the Greek uprising, the Morea (Peloponnese), Continental Greece and the Cyclades. Kapodistrias' diplomatic manoeuvres, aided by the Russian victory in the Russo-Turkish War of 1828–29, resulted in a revision of the protocol on 3 February 1830. According to it, Greece would be fully independent from the Ottoman Empire, but its borders were reduced to the Aspropotamos–Spercheios line. Leopold of Saxe-Coburg (the future King of Belgium) was selected as the first King of Greece, but he rejected the offer.