the aim of spreading and making more known this new sport (football) to the Athenian and Greek public in general. Also, the intention of the founders was to create a team for all of Athens and to be connected with the rest of the European football movement, which was already active. The first president elected was Alexandros Kalafatis, brother of Giorgos. The ground of the team was in Patission Street. Oxford University athlete John Cyril Campbell was brought in as coach, the first time that a foreigner was appointed as the coach of a Greek team. Konstantinos Tsiklitiras, the great Greek athlete of the early 20th century, played as goalkeeper for the new team. In 1910, after a dispute among a number of board members, Kalafatis with most of the players—also followed by Campbell—decided to pull out of POA and secured a new ground in Amerikis Square. Subsequently, the name of the club changed to Panellinios Podosferikos Omilos ("Panhellenic Football Club") and its colours to green and white. By 1914, Campbell had returned to England but the club was already at the top of Greek football with players such as Michalis Papazoglou, Michalis Rokkos and Loukas Panourgias. In 1918, the team adopted the trifolium (shamrock) as its emblem, as proposed by Michalis Papazoglou. In 1921 and 1922, the Athens-Piraeus FCA organized the first two post-WWI championships, in both of which PPO was declared champion. By that stage, the club had outgrown both the grounds in Patission Street and Amerikis Square, due mainly to its expansion in other sports, and began to look at vacant land in the area of Perivola on Alexandras Avenue as its potential new ground. After long discussions with the Municipality of Athens, an agreement was finally reached and in 1922 Leoforos ("Avenue" in Greek) was granted to the club. The move to a permanent home ground also heralded another—final—name change to Panathinaikos Athlitikos Omilos (PAO), "All-Athenian Athletic Club", on 15 March 1924, from now on a multi-sport club. However, the decision was already taken by 1922. In 1926, the Hellenic Football Federation (HFF) was founded and the first Greek Championship under its authority took place in 1927. Panathinaikos won undefeated the Championship of 1929–30 under the guidance of József Künsztler and Angelos Messaris as the team's star player. Other notable players of this Belle Époque period of the team were Antonis Migiakis, Diomidis Symeonidis, Mimis Pierrakos