Kilmahew Castle was built upon the lands granted to the Napiers by Malcolm, the Earl of Lennox around the year 1290. The castle itself was built sometime in the 16th century by the Napier family, who owned it for 18 generations. The Napiers who owned Kilmahew are notable for being the progenitors of most of the Napiers in North America, as well as some of their members who had notable contributions in the field of engineering.
The estate was inherited by George Maxwell of Newark and Tealing (1678–1744) in 1694, when he assumed the name of his maternal grandfather, John Napier of Kilmahew, but having no legitimate children he was the last of the name, although the Napier of Kilmahew coat of arms survives as a quartering of those of Noble of Ardmore, who therefore now represent the family in heraldry. Following his death the estate was successfully claimed by an illegitimate daughter, Jean Smith, who married David Brydie, and was finally sold to Alexander Sharp in 1820 in repayment of gambling debts. In 1839, the estate was acquired by James Burns of Bloomhill (a neighbouring estate), the son of Rev. Dr. John Burns, eventually dying in the Castle in 1871.
The ruins were acquired by the Archdiocese of Glasgow, along with the surrounding estate, in 1948.
The castle was originally a four-storey 16th century tower house. Modifications made in 1744 are attributed to the architect John Douglas. Some obvious gothic modifications were done during the 19th century by Alexander Sharp, who owned the castle at the time.
References:The Jacques Cartier Manor House is the only existing property wich belonged to Cartier, the discoverer of Canada, in 1534. It’s a rare example of a great 16th century explorer’s home. Jacques Cartier opened up the North American continent to the French via the Gulf of Saint Lawrence. The manor house has been restored and furnished to illustrate both the everyday life and the travels of its famous owner. From the kitchen with its red clay floor, to the explorer’s bedroom, this museum has lost none of its period charm.