This is a list of the heads of state of the modern Greek state, from its establishment during the Greek Revolution to the present day.
Following the resignation of Augustinos Kapodistrias, a series of collective governing councils were established, but their authority was often only nominal.
The London Conference of 1832 was an international conference convened to establish a stable government in Greece. Negotiations between the three Great Powers (United Kingdom, France and Russia) resulted in the establishment of the Kingdom of Greece under a Bavarian Prince. The decisions were ratified in the Treaty of Constantinople later that year.
The convention offered the throne to the Bavarian Prince, Otto. They also established the line of succession which would pass the crown to Otto's descendants, or his younger brothers should he have no issue. It was also decided that in no case there would be a personal union of the crowns of Greece and Bavaria.
In October 1862, King Otto was deposed in a popular revolt, but while the Greek people rejected Otto, they did not seem averse to the concept of monarchy per se. Many Greeks, seeking closer ties to the pre-eminent world power, Great Britain, rallied around the idea that Prince Alfred, the second son of Queen Victoria and Prince Albert, could become the next King. British Foreign Secretary Lord Palmerston believed that the Greeks were "panting for increase in territory", hoping that the election of Alfred as King would also result in the incorporation of the Ionian Islands, which were then a British protectorate, into an enlarged Greek state.