Smailholm Tower was originally built in the 15th century or early 16th century by the Pringle family. It was designed, in common with all Scottish peel towers, to provide its occupants with protection from sporadic English raids. The tower was attacked by English soldiers in 1543, 1544 and again in 1546, when the garrison of Wark Castle sacked the tower and carried off prisoners and cattle. The castle was successfully defended against the English in 1640, by Sir Andrew Ker of Greenhead.
Smailholm was obtained by the Scotts of Harden around this time. The Scotts – ancestors of Sir Walter – rebuilt parts of the tower and barmkin. In the 18th century the tower decayed, following the family's move into nearby Sandyknowe. The last owner, the Earl of Ellesmere, handed the property into state care in 1950. It was restored in the 1980s, and now operates as a museum.
Smailholm was a relatively small tower house, offering around 200 m2 of floorspace, later extended by construction of a hall house and second kitchen within the barmkin, or courtyard. The rectangular tower is of four storeys, situated on top of a rocky outcrop.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.