Between 2014 and 2015, a rescue excavation was carried out in the course of evaporative drying of the masonry of St. Procopius Church in Loštice. It complemented the knowledge acquired by a construction-history investigation in 1993, concerning above all the Romanic phase of the edifice. The extent and aspect of the church were also made clearer by geophysical research conducted here in 2018. The original church was elongated, flat-roofed, single-nave building closed by semi-circle apse. Its founder was Petr from Loštice in the first quarter of the 13th century, the son of castle manager and cupbearer Bohuta from Bílina. Petr had his manor, possibly a court later substituted by medieval stronghold, built in Loštice close to the church.