Mona Vale is a large heritage listed 1860s country house in Ross, Tasmania.

Completed in 1867, it is well known locally as the "Calendar House", for its reportedly 365 windows, 52 rooms, 12 chimneys and seven entrances.

Jupp, J lists it as named after Castle Mona, a historic home of the Duke of Atholl and presently a hotel.

[5] Mona Vale was built by Robert Kermode and designed by William Archer, his brother-in-law.

[10] The estate was also the site of a military training ground, and the camp of a light horse regiment during WWII.