The splendid edifice of Ayton Castle, the caput of the Scottish feudal barony of Ayton, dominates the town and district.
The original castle, a peel tower, had once been a stronghold of the Home family. This castle was captured by the English in 1497. The tower was replaced by a classical mansion, which burnt down in 1834.
The estate was subsequently purchased by William Mitchell of Parsonsgreen, Edinburgh, Chief Cashier of the Royal Bank of Scotland. From 1846 to 1851 James Gillespie Graham was commissioned to build a new castle at Ayton in the Scottish Baronial style in red sandstone. Further additions were made in the later 19th century. The interiors of the 1875 are still largely extant. William's son, Alexander Mitchell-Innes (1811–1886), commissioned James Maitland Wardrop to build Ayton Parish Church, with a 36-metre spire, and stained glass windows by Ballantine & Sons.
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.