A four diamond hotel. As you pass through the sculpted bronze doors of this four-diamond, four-star luxury Boston hotel, you will be enveloped by the timeless beauty that has made the Omni Parker House a landmark since 1855. Experience the perfect blend of modern amenities and historic charm at America's longest continuously-operating hotel. copy this link for a history of the hotel and it's famous guests. http://www.omnihotels.com/upload/images/hotels/bospar/pdf/bospar_history%20book%20pages.pdf