The Hans Herr House in Willow Street, Pennsylvania was a museum built by one of the sons of Hans Herr in 1719. This open air museum is open to the public and one of the oldest in Pennsylvania German that stills exists today. This house is the oldest structure and Mennonite meeting house in Lancaster to this day.

It is a large open air museum that is open to public tours. The museum offers the whole village as their exhibit including the 1719 Hans Herr House, a Georgian-style 1835 Shaub House, and the 1890?s Huber House which follows a Victorian style. Moreover, since it is an entire village setting, it also includes barns, outbuildings with animals, a blacksmith shop, smoke house, bake-oven and different farm equipment collection used during those days.