Baltersan Castle is a ruined L-plan tower house located near Maybole, Scotland. The site was originally occupied by Baltersan House, owned by Egidia Blair, Lady Row, who died in 1530. After her death, the house was demolished. The remains of her tomb can be seen in nearby Crossraguel Abbey. Her will survives and shows she was a generous benefactor to the Abbey, relatives, friends and neighbours. The inscription above the door tell us that the existing tower-house was built on the site in 1584, the work of John Kennedy of Pennyglen (near Maybole) and Margaret Cathcart, his spouse.
In 1721, the castle passed into the hands of Captain Hugh Arbuthnot, cousin to John Kennedy of Baltersan. By the middle of the 18th century, the castle had become abandoned and remains so to the present day.
The castle is a three-storey L-plan castle with an attic and garret. Its walls measure1.2 m in thickness. It has a vaulted ground floor and ashlar turrets on the northwestern and southeastern angles that are provided with gun loops.
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.