1. The Palmer House Hilton is a historic hotel located in downtown Chicago, Illinois. It was built in 1871 by businessman Potter Palmer and has undergone several renovations over the years, including a major one in the 1920s. The hotel features exquisite architecture, such as the grand lobby, which is adorned with a painted ceiling and a massive crystal chandelier. Some interesting facts about the Palmer House Hilton include:

- The hotel was one of the first to have electric lighting in the United States.

- The brownie was invented at the hotel’s pastry kitchen by Bertha Palmer in 1893.

- Notable guests over the years have included U.S. presidents, celebrities, and international dignitaries.

- The hotel has been featured in numerous movies and TV shows, including Home Alone 2 and The Untouchables.

2. The Palmer House Hilton is open 24/7. Their phone number is (312) 726-7500.

3. The hotel is easily accessible by public transportation, as it is located near several CTA (Chicago Transit Authority) train and bus stops. There are also several parking options nearby, including a valet service at the hotel. Ticket information for events at the hotel can be obtained by contacting them directly.