The Palmer House - history and elegance
I stayed at the Palmer House twice this summer for three nights each. Once was for a conference held in the hotel. The conference facilities were excellent, great audio / visio, great food and service. The Palmer House has a long and storied history. Which you can discover when you stay there. The architectural features have been lovingly restored. The rooms are small - because it's an older hotel of course. It was once the largest hotel in the world with 1,639 rooms. An interesting fact is the hotel was completed on September 26, 1871, 13 days before the Great Chicago Fire, which destroyed the hotel. Undaunted, it was rebuilt. 
The rooms are immaculate. The quality of the beds, bath and room is excellent. You will have no worries during your stay.