OKLAHOMA CITY (AP) — Restoration specialists at the Oklahoma Capitol are scratching their heads over some unusual discoveries made in the walls and hidden spaces of the 100-year-old building.

Workers involved in the $245 million renovation project have found doors and windows that defy explanation, and they'd like to know more about a stone carver who put the initials "C.W." on the sides of two chimeras atop the Capitol.

Oklahoma legislators voted to fund the restoration, and dozens of workers are demolishing walls and updating the infrastructure to the symbol of state government. Work is expected to wrap up by 2022.