An historic castle once used for hunting by Robert the Bruce has been advertised for sale for £675,000 – more than a million pound less then when last put on the market in 2017.

Two years ago Dalmoak Castle was put on sale for £1,680,000 by House Simple, but now Savills is advertising the Dumbarton Victorian Gothic mansion for much less.

The property, which dates from the 1860s, features what are claimed to be the largest stained glass windows in a private UK home.

The biggest stained glass window is around 10ft high by three feet wide and is understood to depict members of the family who once lived the there.They were created by glaziers WG and JJ Kier, early stained glass producers known for their work at Glasgow Cathedral.

The 14-bedroom house was created by architect Alexander Watt. The Savills advertisement claims the category A listed home boasts original features including gun loop details, square plan tower, armorial plaque and monograms of the owner, James Aiken, on keystones.

The estate is steeped in history. Some sources claim the land was owned by Robert the Bruce at one time, but the oldest document relating to ownership is from the 16th century.

During the Second World War the Royal Air Force used the castle as its local headquarters. In 1989, it became a nursing home and was fully restored in the 1990s.

The accommodation extends to around 9,500sqft and includes a basement with wine cellar, offices/studies and a grand hallway with imperial staircase and arched stained glass windows on the landing.

The lavish public rooms include a drawing room, study, music room, and formal dining room, and there are tower rooms on the second and third floors with a roof terrace on the fourth floor.

To the north of the grounds there are former stables which are now privately owned cottages.