If you are driving in to Church on Sunday, plan your trip and parking ahead. The Philadelphia Marathon takes place that morning! The runners will be running by the Church between miles 6 and 7, which by my estimation translates to between 7:30am and 9am. However, your route into West Center City may be blocked.
Road closures: http://www.philadelphiamarathon.com/hotel-travel/travel-tips
Course map (temporary road closures): http://www.philadelphiamarathon.com/files/Certified_Marathon_Map.pdf