Dajti Castle, Archaeological site on Mount Dajti, Albania.

Dajti Castle is a 1.12-hectare archaeological site at about 1,200 m on a saddle-shaped hill on the western side of Mount Dajti. Its walls follow the slope in a triangle with a 550 m perimeter, about 2.3 m thick, with round towers at the three corners. A cross wall divides off a small acropolis, and house foundations and three terraces lie inside.

The fortress was built in the 6th century when Byzantine Emperor Justinian I constructed defenses against Slavic invasions. Archaeologists discovered the remains in 1963 and began uncovering layers of the past.

The name Kalaja e Dajtit links the ruin to Mount Dajti above Tirana. Two building phases are visible: large quadrangular blocks laid without mortar, attributed to Illyrian work, and smaller stones set in lime mortar from the Roman period. Look for the stamped tile fragment whose figures recall Illyrian decorative motifs.

Visitors can reach the site using a cable car from Tirana or by road and hiking paths to the peak. The best time to visit is during clear weather when views over the city and surrounding area are especially good.

Excavations at the site uncovered coins from the time of Emperor Tiberius II Constantine. These finds suggest that people there also engaged in metalworking and used iron tools.