decline in the 4th and 5th century CE, with an apparent fall in population and the conversion of many formerly public buildings and temples into workshops. Medieval Period The acropolis continued to be occupied until at least the 12th century, as attested by finds of coins and pottery; a new conduit for water was built at some point during this period. Some time in the medieval period, the site was re-fortified with a perimeter wall incorporating many ancient spolia, which likely dates to approximately the 11th-12th centuries. Modern Times Around 1900, the so-called 'Houses of the Raisin-Pickers' were built, using spolia from the ancient city, which appears by this time to have been in use as a large quarry. Archaeology Early excavations at Aigeira were often partial and patchily recorded. In the late 19th century, the Greek archaeologist Valerios Stais uncovered an inscription bearing part of Diocletian's Edict on Maximum Prices, issued in 301 CE, though he did not record either the precise circumstances or the location of the finds. During his survey of the Peloponnese in 1836, William Martin Leake discovered the remains of the harbour at a small cove then known as Mavra Litharia, but they attracted little archaeological attention until the 1990s. In 1904, Hans Schrader acquired objects from a Mycenaean grave with 'Aigeira' listed as the find-spot, but the excavation that produced these has gone unrecorded. The first formal excavations took place in 1916 and 1925 under Otto Walter and the Austrian Archaeological Institute in Vienna. Walter discovered the Hellenistic theatre, as well as three naiskoi in the area. In 1972, excavations resumed under Wilhelm Alzinger, who led them until 1988. Alzinger's excavations focused on the acropolis, the theatre, the ruins of the temple of Zeus and the space between the theatre and the temple of Zeus. Several further naiskoi were discovered near the theatre, including one with a pebble floor mosaic representing an eagle with a serpent, as well as the Tycheion (sanctuary of Tyche) described by Pausanias. Between 1975 and 1980, much of the 'lower town' was also uncovered. During Alzinger's tenure, Sigrid Deger-Jalkotzy worked on the excavations from 1975 to 1986, primarily analysing and publishing the late Mycenaean pottery. Excavations between 1990 and 1997, under Anton Bammer, focused on a survey of the urban area and investigated, inter alia, the water supply and public spaces of the city. Georg Ladstätter lead the excavations