Sutter's Fort is getting its most extensive renovation since the 1890's.
The exterior walls were last repainted 60 years ago, but this project is much more than a fresh coat of paint. State Parks says mortar will be repointed and cracks will be filled.
The main, central building in the fort will also be retrofitted for earthquakes.
Officials will close the fort to the public for 30 days starting July 13.