The city of Portland will help raise money Wednesday for a nonprofit group that is helping restore several old portraits of former mayors and prominent residents. The event, beginning at 5 p.m. in the State of Maine Room at City Hall, will include a discussion led by local historians about William Pitt Fessenden, who served in the U.S. House and Senate before becoming President Lincoln’s secretary of treasury, according to a news release from the city. Fessenden’s portrait was one of two found in the attic at City Hall.

In 2013, the city announced a partnership with the Maine Project for Fine Art Conservation, a nonprofit group with a restoration lab in downtown, to restore more than a dozen portraits found in City Hall. Some of the remaining portraits to be conserved include Fessenden, Portland Mayors George Wescott (1873-1874), Charles Libby (1882) and Fredericke Boothby, as well as Cyrus H.K. Curtis, donor of the Kotzschmar Organ.

Upon completion the conserved artwork will be displayed on the walls of City Hall along with a presentation illustrating the conservation process.

City Hall Communications Director Jessica Grondin said attendees will be asked to make a donation to either the nonprofit or the city.