Originally the home to several manufacturing enterprises owned by William H. Ziock, Jr., the tower became the headquarters of Amerock in the 1940s.

In 2015, the Ziock Building was purchased, commencing renovation and redevelopment of the site into a high-rise hotel and convention center, which opened in 2020.

William H. Ziock, Sr. was a woolen goods maker in Hattingen, Germany who immigrated to St. Louis, Missouri in 1847.

Production for the Ziock enterprises was slowed with the onset of World War II, as Japan had been their primary provider of silk.

In 1940, after years of sustained success despite overall economic hardship, the company combined the words Rockford and American to become Amerock, and used the name in their branding.

The last company operations in Rockford closed in the 2000s following relocation to Columbia, Maryland and Huntersville, North Carolina.

[2] On May 4, 2011, the building was recognized by the National Park Service with a listing on the National Register of Historic Places, making the property eligible for federal and state historic tax credits to cover a large part of the costs of renovation and reuse of the building.

[4] On July 1, 2020, a few months behind schedule due to the 2020 COVID-19 pandemic, the hotel welcomed its first guests with a soft opening.

The hotel's amenities include a pool and hot tub on the ground floor, arcade and fitness facility, gift shop, conference center, top floor restaurant with a rooftop bar, and 160 suite-style hotel rooms.