Plean Tower comprises a small oblong tower house probably dating from the 15th century, and an adjoining 16th-century manor house.
Robert Bruce granted the barony of Plean, or Plane, to John d’Erth soon after 1314. The castle was probably built by Lord Somerville, who acquired the lands of Plean in 1449, through marriage.
An adjoining manor house was built in about 1528. In 1643 James Somervell, 8th Lord of Plane, sold the barony and lands to meet debts. It passed to the Nicholsons and the Elphinstones, but both the tower and the manor fell into disrepair. During the 1745 rebellion the Jacobite troops used the property.
Sir David Menzies restored the buildings in 1908, but by the 1930s they were again no longer in use. It was rebuilt from ruins by Nancy and John Patrick Wright and their sons in 1991-1997 to form a home and holiday accommodation.
Plean Castle originally had three stories and a garret, with parapet corbelling. In its rebuilt 1990s form there is a great hall in the tower with painted ceiling beams and a large fireplace. The adjoining modern 'manor house' is connected to the tower by a wooden walkway and is built over a vaulted basement surviving from the 1528 manor house.
References:Trenčín Castle is relatively large renovated castle, towering on a steep limestone cliff directly above the city of Trenčín. It is a dominant feature not only of Trenčín, but also of the entire Považie region. The castle is a national monument.
History of the castle cliff dates back to the Roman Empire, what is proved by the inscription on the castle cliff proclaiming the victory of Roman legion against Germans in the year 179.
Today’s castle was probably built on the hill-fort. The first proven building on the hill was the Great Moravian rotunda from the 9th century and later there was a stone residential tower, which served to protect the Kingdom of Hungary and the western border. In the late 13th century the castle became a property of Palatine Matúš Csák, who became Mr. of Váh and Tatras.
Matúš Csák of Trenčín built a tower, still known as Matthew’s, which is a dominant determinant of the whole building.