The closest hotel anywhere near the Parkway is 18th & The Parkway across the street from the church. The Sheraton is on 17th near Vine Street.
Sheraton Philadelphia..
A little more central but a nice walk to the museum in summer is the Club Quarters on Chestnut.
I recommend the Sheraton Philadelphia Downtown hotel located nearby at 201 N 17th Street. It is a good quality place to stay with very reasonable prices, considering the location.
There are located on the main strip of broad street.
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