Complex sentence: The most notable historical building is probably Castle Gogar, an A-Listed Scottish Baronial L-plan mansion, built in 1625 by the master architect William Ayton for John Cowper, whose father had bought the estate in 1601.
Split into simpler sentences: The most notable historical building is probably Castle Gogar, an A-Listed Scottish Baronial L-plan mansion. It was built in 1625 by the master architect William Ayton for John Cowper, whose father had bought the estate in 1601.