[1] 633 Building was named the Clark Building in 1967 after it was sold to Clark Oil, a Milwaukee-based oil company.

[2] In 2017, the property was acquired by Milwaukee developer Josh Jeffers, who intended to redevelop the 48,000 square feet of commercial space on the southern side of the ground floor.

[3] A 40-foot (12 m) Miller Brewing Company sign is located on top of the tower.

[4] In January 2025, Jeffers announced plans to convert part of the building into 224 residential apartments with 180 of them qualifying as low income housing.

[5] Robert Lee Hall & Associates provided the architecture for 633 Building, while Southern Builders served as the general contractor.