Blythswood House

Blythswood House was a neoclassical mansion at Renfrew, Scotland.

It was designed in 1821, by the eminent architect James Gillespie Graham for Archibald Campbell, the Member of Parliament for the Glasgow District of Burghs. On his death in 1838 it passed to his second cousin Archibald Douglas of Mains, who adopted the name of Campbell.

The house contained a well-known laboratory that was used from 1892 to 1905 to experiment into many areas at the borders of physics, including the use of cathode rays, X-rays, spectroscopy and radioactivity.

The house remained the seat of the Lords Blythswood until its demolition in 1935. Five years later the family title became extinct.