The Historical Society of Pennsylvania has a long connection to the LDS Church. In 1850, the Society hosted a lecture by Thomas L. Kane defending the Mormon religion and its people. I've included part of his lecture on this blog and will continue to excerpt it as I have time.
With the Philadelphia LDS Temple opening in September, the Historical Society will host a display on Mormonism in the Greater Philadelphia Area. Here is a description of the event, which will run from August 9 through September 16 at the Historical Society of Pennsylvania, 1300 Locust Street, Philadelphia.
If you are downtown, you will not want to miss the display. The Historical Society is located at 1300 Locust Street.