The building of the Bishopric of Nikaia is located in the square of Osias Xeni. It houses the ecclesiastical museum, which was inaugurated in December 1972, 50 years after the Asia Minor Catastrophe. The soul and creator of the church museum was the Metropolitan of Nikaia.

The church of Agios Ioannis Chrysostomos was founded in a shed by the refugees who lived in the area, the majority of whom were refugees from Ephesus and Kirkitsa.

The Young Men’s Christian Association (YMCA) branch, known in Greek as the Christian Youth Brotherhood (ΧΑΝ), was established in 1936 as an affiliate of the YMCA of Athens.