The LondonHouse hotel at Michigan Avenue and Wacker Drive. View Full Caption DNAinfo/David Matthews

DOWNTOWN — A man fell to his death Monday afternoon while on a roof of the LondonHouse hotel off Michigan Avenue, authorities and hotel officials said.

The 44-year-old man was pronounced dead at 3:45 p.m. after falling from the 23rd floor of the luxury hotel at 85 E. Wacker Drive, said Larry Merritt, a spokesman for the Chicago Fire Department.

The death appeared to be accidental, said Officer Thomas Sweeney, a Chicago Police spokesman.

It's unclear why the man, who was not a hotel employee, was at the hotel and how he fell.

“Officials at the hotel are working with the Chicago Police Department and other first responders regarding the death of a man who apparently fell from a 20th-floor parapet wall to a 6th-floor rooftop earlier this afternoon," George Jordan, senior vice president of operations for Oxford Hotels & Resorts, which manages the LondonHouse, said. "We offer our condolences."

A 44-year-old man died Monday after falling from the LondonHouse hotel at Michigan and Wacker, authorities said. View Full Caption DNAinfo/David Matthews

A parapet is a narrow wall that outlines the rooftop of a building.

Parts of Wacker Drive were closed near the hotel after the fall.

The man was not yet identified by the Cook County Medical Examiner's office.