The earliest settlement in Kirra dates to the 3rd millennium B.C. In the region where nowadays lies the church of the Dormition of Mary have been investigated parts of houses in subsequent phases, the oldest of which date to the Early Helladic period. The dense settlement was thriving in the Middle Helladic period and the early Mycenaean era. Excavations carried out during the last few decades have proved that the settlement stretched also in large part of present-day Kirra. Until now there have been investigated houses, streets and several tombs. One of the most important finds is a very well preserved pottery kiln. 
In the historic era, Kirra, known by the ancient authors as port of Delphi, constituted a favorite destination of pilgrims and merchants who regained strength there in order to proceed to the Panhellenic sanctuary. Port infrastructure secured the harboring of the ships, whereas a strong wall, with rectangular towers, built probably in the mid-4th century B.C. surrounded and protected the settlement. 
In the 5th century B.C. were constructed the ship sheds, the best preserved and visible monument nowadays. They consisted of at least five rectangular and long spaces open to the sea, in which it was possible to drag small ships. The two rooms at the back, accessible by door openings on the north side were probably used by the travelers for resting or storing merchandise. 
Kirra had also an important sanctuary, dedicated to Apollo, Artemis and Leto. In the region where today lays the Church of the Dormition of Mary there was an open-air, rectangular area measuring 160 x 130 meters, surrounded by porticos open towards the interior, where the temple building was erected. A selection of clay figurines which had been offered to the gods is displayed in the Archaeological Museum of Amphissa. 
Visible antiquities exist also in other parts. On Agiou Nikolaou Street has been discovered the eastern part of an early Byzantine basilica church. On the beach lies a medieval tower built with ancient building material, whereas adjacent to it is also a three-nave early Christian basilica. Kirra declined in the Roman Imperial period, gradually shrinking into a small community which lived over the ruins of the ancient city. The final abandonment dates probably in the early Christian period, possibly in 551, when an earthquake caused great damage. 

Text - Translation: Dr. Aphrodite Kamara, Historian