Which preposition to use with lusatia

in Occurrences 1%

The author of the Wissenschaftslehre was the son of a poor ribbon maker, and was born at Rammenau in Lusatia in 1762.

to Occurrences 1%

They were at length "fairly beaten to powder" by Albert the Bear, "and either swept away or else damped down into Christianity and keeping of the peace," though remnants of them, with their language and customs, exist in Lusatia to this day.

Which preposition to use with  lusatia