During World War I, Rees served on the International Board of Arbitration for newspapers and later for unions, which gave him the opportunity to travel throughout Europe.

Rees attributed his great interest in bells to visiting carillons in Belgium and the Netherlands.

His initial interest is claimed to be the result of articles he had read in National Geographic, among other publications.

[4] The Rees Carillon was closed for a period in 1993 while it underwent a major structural renovation.

[9] Constructed out of concrete, brick, and steel, the tower is an excellent example of the brutalist architectural style.

[3][5][13] World class carillonneurs come to the United States to play the International Carillon Festival.

[13] Entrance to the Thomas Rees Memorial Carillon requires paying a nominal fee.

[3][13] Visitors to the carillon can travel to the top by elevator where a scenic view of Springfield awaits.