Porta Panagia, Eastern Orthodox church in Pyli, Greece.

Porta Panagia is a three-aisled basilica with a cross roof, built of large limestone blocks up to 2 m high and enclosed brick above. Its walls carry ceramic jagged bands, meanders and crosses, and the windows are double- or triple-arched. A late 14th-century exonarthex stands at the west, and the marble templon survived the 1855 fire.

The church was built in 1283 by John I Doukas, a ruler of Thessaly, and served as the main building of a monastery for centuries. Ottoman forces destroyed the settlement in 1822 during conflicts leading to modern Greek independence.

The church is dedicated to the Dormition of the Theotokos and was originally the katholikon of a stauropegic monastery dedicated to the "Unconquerable Panagia". The village of Megale Porta, now in ruins, was the birthplace of Saint Bessarion, Metropolitan of Larissa. The exonarthex, added in the late 14th century, is of the cross-in-square type with four small corner niches.

The church sits on the northern bank of the Portaikos river and is reachable on foot by following the road from modern Pyli town and walking upstream. The best time to visit is during warmer months when walking paths are dry and easy to navigate.

The exterior walls feature large limestone blocks arranged in cross patterns rising about two meters high, while double and triple arches are lined with ceramic decorations. This unusual stone arrangement is rarely seen in other churches of the region.