One of the rocky hills of the karst plateau at the foot of the Bakony is crowned by the round church (rotunda) in Eskü with a domed roof, about the origins of which many adventurous theories have been formulated in the past. Many thought it was originally a Turkish mosque or perhaps the remains of a castle tower and even suggested a Roman origin.
During the investigation related to the restoration, it was discovered that the nave is not round but oval (its diameter is almost 7 m) and that the top may have originally been conical. The inner arch of his sanctuary was originally in the shape of a horseshoe rather than an elongated semicircular arch. The entrance was once at its current location, but the original shape of the portal cannot be reconstructed. Two Romanesque sliding windows open on the south side and a small round window on the west side. The sanctuary may have had similar windows.
The original name of the village was Ÿskő, it was once owned by the Szalók family. In the middle of the 15th century it became the property of the Ujlakis, who also built a castle in the village. It may have been built in the 11th century as one of the round churches of the Árpád era (this was also proven by the restoration of the monument in 1975/76). The Ujlakis' castle rose on the hill across the stream below the hill. After the fall of Székesfehérvár (1543) the village was destroyed by the Turks. The new owners, the Zichys, populated the village with Slovaks from the highlands from the 1710s. The current roof shape was built at the beginning of the 18th century. In 1725 it was rebuilt as a Catholic church. The church became too small for the growing population and so today's parish church was built (1843-1847). Since then, the round church has been used as a chapel.