It is not known when exactly the original romanesque church was erected. Sometimes it is considered that this may have happened in 1023, because such date is engraved on the temple’s pastophorium, however, this information is uncertain, because this date was partially illegible in the 19th century. The original temple was probably destroyed during the Mongol invasion in 1241-1242. Reconstruction and significant transformations took place in the gothic period. The last major reconstruction combined with the renovation was carried out at the beginning of the 20th century, when the west façade of the building was changed.
The temple is a single-nave building with a two-sided ended chancel. Its total length is about 18 meters, and the width is 6 meters. It has two narrow early gothic windows in the nave and three similar ones in the chancel and a portal from the south. The interior of the nave was separated from the presbytery by a semicircular arcade. The vhancel originally had rib vault.
Bóna M., Žazová H., Kostol sv. Heleny v Demandiciach-Hýbeci, [w:] Pamiatky 4, 2010.