Hopfau, Germany (known as Hopfau 721 because there are two Hopfau's in Germany) is the ancestral home of the Gallinger family. Our roots have been traced back to 1675 in that town.
This is further back than is noted in "The Gallinger Family History" book that was produced in 2001. Lily, our resident genealogist, has more details.
For information on Hopfau in English, visit the Hotel an der Glatt (German, English). They have some pictures of the area too to give you a feel for it.
These maps are courtesy of Yahoo! and show the location of Hopfau in progressively more detail. The final one is the street map. The 'map scale' information is shown in the bottom right corner of each map.