Ciriacus of Ancona was probably the first traveler who visited or passed near Nemrut Kale (Aigai). This visitation must have been before 1447, between 1444 and 1446. Approximately 400 years later, Colonel William Martin Leake briefly mentions during his pass in the region that there is not sufficient data on the locations of Aeolian cities, including Aigai, which Strabon mentions. Shortly before 1828, an English pastor and researcher who has lived in İzmir, Arundell mentions Aigai which is one of the Aeolian cities that mentioned by Herodotus, because of a trip held around Menemen, only because its approximately to Temnos. There is not enough data to confirm that he visited the city. Charles Texier, a wanderer who traveled whole west coast of Anatolia between 1833 and 1837, mentions Aigai but it seems like he never visited the Nemrut Kale (Aigai).

In the map Henrich Kiepert made, he located Parthenion which is at the Bakırçay (Kaikos) Valley, to the location of Nemrut Kale which was placed on further north from its original location by him. According to Ramsay, Kiepert agreed with many wanderers who thought Aigai was near Güzelhisar. The primary information about Aigai was given by Demosthenes Baltazzi who owned wide lands in the region and occasionally lived in his farm in Aliağa.

The first studies at the archaeological site of Aigai were carried out by French researchers. The first research in the city was carried out in 1881 by S. Reinach. Reinach suggests that the first examination of the settlement on the Nemrut Kale was carried out by him and W.M. Ramsay. First excavations in the city were carried out in the summer of 1882 by French researcher M.A Clerc. Clerc excavated 450 graves during his excavations in the necropolis area and the findings of which are preserved in the Louvre Museum. The most extensive research in the city was carried out by R. Bohn and C. Schuchhardt, who were members of the Pergamon excavation.

The modern road on the Gün Mountain, where the ancient city of Aigai is located, came in the early 2000s. Until this date, nobody dared or could not dare to carry out excavations in the city. Recent excavations in Aigai were conducted between 2004-2016 by a team headed by Prof. Dr. Ersin Doğer from the archaeology department of Ege University. The studies and excavation have been carried out with the participation of scientists and students under the direction of Prof. Dr. Yusuf Sezgin.