"Thorold's Carnegie Library was opened in April 1912, having been made possible by a donation of $10,000.00 from Andrew Carnegie. The architect was A.E. Nicholson, who is also responsible for the Grimsby and Merriton Carnegie Libraries. In 1902, when the grant was made, the population of Thorold was 2,400. In 1947, the interior of the library was remodelled, making it one of the most up-to-date libraries in Ontario. There were approximately 11,000 books on the shelves for a membership of 900. A music library was added with 200 record albums in circulation. Thorold's present library was built adjacent to Chestnut Hall, opening June 18th, 1983."

"Our Carnegie Library has a strong architectural presence and is a local landmark. This building is well-maintained and is a special place for our Thorold Seniors to celebrate and enjoy their time together. Reusing our heritage buildings makes them a key element of our community." Ontario Heritage Properties Database