Agios Ioannis Arkadias is a mountainous village built at an altitude of 725 m, 18 km west of Astros Kynouria.
It is administratively subordinated to the Municipality of North Kynouria and has 71 inhabitants.
Its contribution to the 1821 revolution was important, as he brought forth important personalities such as Panos Sariyannis and Anagnostis Papazoglou, as well as the inhabitants of Astros, brothers Zafiropoulians (Ioannis Zafeiropoulos, Konstantinos Zafeiropoulos and Panagiotis Zafeiropoulos (Akouros), which played a key role in the preparation and during the revolution. Upon the onset of the revolution, over 100 Aghiannians, most notably the Georgaki Digeni, who under the leadership of the Zafiropoulos family, were joined by the various Kynourian military bodies.
Their participation in various battles, such as the one in Doliana, Vervena, Tripolitsas, etc. was also important. In the summer of 1822, Agios Ioannis became the capital of the Temporary Government of the Revolution, from August the 15th to October the 1st.
In 1826 the village was completely destroyed by the hordes of Ibrahim Pasha, and the same fortune had other villages in the area.
Ibrahim Pasha also destroyed many churches, such as Agios Vasilis, Agios Eustratius, Agios Petros and many others, as well as the School of Karytsiotis.