Funa - a medieval outpost of the Principality of Theodoro. This fortress is located on the west side of the mountain South Demerdzhi on a rocky hill. Translated from the Greek name of the fortress sounds like "smoky." In the old days the mountain Demerdzhi also was called "Funa".

Strengthening Funa is a monument of archeology and architecture and is located two kilometers north of the village Radiant, it is possible to drive from the city of Alushta, where, right from the bus station, shuttle bus. Also, if you go toward the radiant, just below the Kutuzovsky fountain is paved road. Two kilometers to the village, the rocky cliffs of western Demerdzhi, one can see the ruins of the medieval fortifications. Above the ruins left over from his defensive walls, one can see a semicircular protrusion - apse. In the old days there was located the altar of the church of the fortress, which has been saved up to the thirties, and placed adjacent residential buildings, which today are a pile of stones. Approximately three hundred meters north of the burial is to strengthen the residents of the village and fortress Funa.

Funa first mentioned in 1384. While it represented an outpost of the Principality of Theodoro and had an important military purpose. In medieval fortress near the trade route from Alushta (Aluston) and Gurzuf (Gorzuvita) in the steppe Crimea.

At the foot of the mountain Demerdzhi settlement did not occur by chance, the main reason was the presence of a busy road. Examining the settlement, archaeologists have come to the conclusion that its origin relates to the fifth or the beginning of the sixth century.

After the coast of the Crimea was captured by Kaffa and Genoa to Chembalo, opposite the Genoese fortress was built several fortresses princes Theodoro .  These fortresses were restrained and control of the enemy's advance on the Crimean peninsula, and also represented a springboard to capture coastal cities .  Theodoret were forced to take such action as the Genoese fought for the right to enjoy the coast .  Funa was the eastern border outpost, which is opposed both in the territory of the Genoese fortress, and oversaw one of the most important caravan routes from the coast of the Crimea .  Despite the efforts of scientists, Funa still largely remains a mystery, since written sources about it quite scarce .  Only letters patriarchal 1384 Funu mention as one of the points of dispute between the metropolitans Gotha, Sugdeyskim and Kherson .  Also, the settlement is mentioned in church records dating back to 1836 year, a survey of the Greek settlers from the Crimea in Mariupol county . 

Today, the strengthening of Funa - a ruin, consisting of a pile of stones. Under them disappeared and front yard and two-story church. Instead Funy its residential houses, taverns and shops remained just a solitary splinter church apse, which hung over a large garden beside the road to the plateau.