The Municipality of Trikkaion belongs to the Trikala Prefecture of the Thessaly Region and its present form is due to the extension of the former Trikkaion Municipality with the consolidation of the former municipalities of Paliokastro, Estieotida, Kallidendro, Great Kalyvia, Foleratia, Paralitha and Koziaka, according to the Kallikratis program.
The Municipality has an area of ​​608,48km2 and a population of 81,355 inhabitants, based on the latest census of 2011.
The headquarters of the Trikala Municipality are Trikala.
The particularly picturesque town of Trikala flows through the river of Lethaios, the tributary of the Peneus. It is a vibrant, economic and commercial city.
Historically, Trikala is an ancient city called Trikki, due to the daughter of the mythical Asopos, Tricky. Another tradition says that the city was the home of Asclepius.
The name Trikala is mentioned for the first time by Anna Komneni (Byzantine princess, historian, physician and important figure of the spiritual life of the Byzantine Empire in the 12th century).
As the whole of Thessaly suffered medieval times by raiders, Trikala was also troubled by Goths, Slavs, Bulgarians, Normans, Franks and Catalans, Vlachs, Serbs and Albanians. The reasons were the location of the city and its fertile plain.
Early Christian times Trikala flourish. In the 6th century it was erected by the Justinian Byzantine fortress. In the 9th century, Bishop Trikkis Constantine took part in the Synod of Constantinople in 879. During the years of Basil II of the Bulgaricon, Trikala was wounded by war and in 1081 it was conquered by the Normans. In 1204, the city became part of the Frankish state of Boniface and then joined the despotate of Epirus. In the 14th century the Serbs became dominant and at the beginning of the 15th century the Turks occupied it, until 1881, when Thessaly was liberated.
There are important sights in the city of Trikala, such as the Fortress of Trikala with a characteristic clock. A work that was created during the time of Emperor Justinian (6th century) on the ruins of the acropolis of the ancient city of Trikkis.
In the Asklipieion of Trikala, the excavations brought to light three Roman-era buildings and a Byzantine-era building.
The Kursum Mosque is declared as a UNESCO World Heritage Site. It was built in the 16th century by Osman Sach with architect known as Mimarsan.
Mili Matsopoulos, a work of 1884, was the first cylinder mill in Greece and the largest in the Balkans. In recent years every Christmas in this area, the largest Christmas theme park is being created.
The neighborhoods of Varoussi and Manavika are among the oldest in the old town of Trikala. There are many preserved buildings and churches, Byzantine and post-Byzantine.
The central Lithia bridge connects the central square with the Asclepius pedestrian bridge, built in 1886.