Things you need to know about Naperville carillon

Total cost: $7.1 million

Project began: 1997

Donors who supported the bells and tower: At least 137

Phase 1 completion: June 2000

Phase 2 completion: July 2007

Architect: Charles Vincent George Architects of Naperville

Civil engineer: Roake and Associates of Naperville

Structural engineer: McCluskey Engineering Corp. of Naperville

Phase 1 contractor: Schramm Construction Co. of St. Charles

Phase 2 contractor: Bovis Lend Lease of Chicago

Bell foundry: Royal Eijsbouts foundry in The Netherlands

Pillars: 4 of them represent Naperville's core values of family, education, community and commerce

Tower height: 160 feet

Tons of structural steel: 70

Cubic yards of concrete: 800

Precast stone pieces: 185

Bells in the lower belfry: 10, including the 5½-ton, $70,000 Big Joe

Bells in the upper belfry: 62

2017 maintenance and operations cost: $126,366, paid by the city of Naperville to the Naperville Park District

Carillon tour cost: $3