The Ecseri church ruins are the only, and partially standing, medieval monument in Szentes and its surrounding area. The remains of the building can still be seen today along the road leading from Szentes to Szarvas, in the middle of a field.
Ecser was originally a Cuman settlement and later a Cuman village. The church originally measured 15.75 m by 8.57 m. The sanctuary is octagonal, with three sides forming an apse with the nave. It is a building with characteristic Romanesque masonry, constructed of brick and fieldstone. The dimensions of the bricks, the different masonry technique, and the semi-circular window above the southern entrance prove that the church also had an Árpád-era period. Based on the archaeological finds, the building is thought to date from the second half of the 13th century. The single, thick buttress standing at the south-eastern corner of the sanctuary was added later. The former village of Ecser was destroyed during the Turkish-Tatar invasions in the 17th century and was never rebuilt. The ruins of the church still stand today, reaching a height of 5–6 metres. Fragments of wall paintings have also been found in the church.
