The Frankeberger Tavern,

the oldest building in our little town, is owned and maintained by the
Mechanicsburg Musuem Association . This tavern was in use during 1801-1810, a time when there was a dependency on herbs, greatly used for seasonings, preservatives, medicinals, for dyeing fabrics, as insecticides, teas and other beverages, as well as many other household tasks.
The little garden on the East side of the Frankeberger Tavern is intended to represent a typical Pennsylvania German Four Square Garden of the period.

Dating back to Medieval monasteries, such gardens (typically much larger) were a way of life for everyone, especially the innkeeper and traveler.
This Pennsylvania Redware plate shows the layout of a typical foursquare garden.

Brought to this area by the Pennsylvania Germans, the gardens were traditionally four squares within a larger square, divided by two paths for easy access, well tended and planted for high yield. They were often planted in raised beds for better drainage and of course planted in full sun.
Another example of a raised garden bed,

this bed of early spring greens can be found at the Tavern at the
Landis Valley Museum.