NASHVILLE, Tenn. (AP) -- Workers are putting the finishing touches on a renovation of the state Capitol as they prepare to re-open the 153-year-old building later this month.

The nearly $16 million project largely focused on upgrading electrical, mechanical and plumbing systems. Parts of the building also got new carpets, paint and security upgrades.

The governor, executive staff, constitutional officers and legislative workers are in the process of moving back into the building that has been closed since May. The public will be able to gain entry on Dec. 17.

Visitors will now have to have their driver's licenses scanned upon entry to the building, and a more extensive internal and external video surveillance system has been installed.

Officials declined to explain details or the rationale for the enhanced security.