Monuments and sights The town is still dominated by its medieval castle, probably built in its present form in the 13th century, although the large round tower likely dates to the Catalan period. The castle's last military use was during the Greek Civil War. The castle was restored in 2011–15 with EU funds under the supervision of the 24th Ephorate of Byzantine Antiquities and is open to the public from 19 December 2015. The Byzantine Museum of Phthiotis, housed in an old barracks building erected in 1836 and open to the public since 2007, features Byzantine artifacts discovered in archaeological digs across the Phthiotis Prefecture, including mosaics and items of daily use, as well as a significant coin collection. The town features also the Byzantine-era Church of Hagia Sophia, built on the site of an older, early Christian church. The church masonry incorporates many pieces of spolia from the early and middle Byzantine periods, as well as the post-Byzantine era. At the southern side, archaeologists have discovered remnants of a 5th-century baptistery. The town's old cathedral church, dedicated to Saint Nicholas, dates to the 18th century, but portions of a mosaic floor and reused architectural elements point to the existence, on the same location, of an early Christian basilica. Notable sights are also the "Kakogianneio" Astronomical School and planetarium, the traditional water mill at the waterfall near the entrance of the town, and the martyrs' monument at the central town square, dedicated to the people executed by the Germans on 17 June 1944. Due to the proximity of Oeta, Ypati has also become a centre for excursions to the mountain, and is the starting point of several trekking paths. The 15th-century Agathonos Monastery is located some 3 km west of the town. The monastery also houses the Oiti Natural History Museum, dedicated to the geology, climate, flora and fauna of Mount Oeta and its national park. See also List of Catholic dioceses in Greece References Sources and external links Official Website GCatholic - (former and) titular Catholic see Municipality of Ypati at the GTP Travel Pages Bibliography - ecclesiastical history Pius Bonifacius Gams, Series episcoporum Ecclesiae Catholicae, Leipzig 1931, p. 429 Michel Lequien, Oriens christianus in quatuor Patriarchatus digestus, Paris 1740, Vol. II, coll. 123-126 Gaetano Moroni, lemma 'Patrasso o Neopatra o Nova Patrasso', in Dizionario di erudizione storico-ecclesiastica, vol. LI, Venice 1851, p. 291 Konrad Eubel, Hierarchia Catholica Medii