In 1974-75, the mansion underwent a major renovation which included the plumbing, heating, air conditioning and electrical systems.

The mansion underwent a complete renovation in 1838 only to perish in a fire 47 years later in 1887.

The mansion has undergone many changes and simplifications since its construction.

The mansion is now part of Naper Settlement and underwent an extensive restoration from 2000-2003.

During the 1990s, the mansion underwent a $4.4 million refurbishment program.

The mansion underwent a $3 million restoration before being opened as part of an Inn in 1989.

Dianne found the Nebraska Apollo displays while the mansion was undergoing renovations and didn't know exactly what they were.

Since 2005 the mansion has undergone renovation worth 200 million yuan.

The 22-room mansion has undergone historic restoration and is currently interpreted to reflect the 1930s era when the Lilly family occupied the residence.

Already beginning in the early 1920s and until the late 1970s, the mansion underwent a number of use-changes.