Detail
Type Jagdschloss - Possen is a Jagdschloss.
See Oberspier - A See notation means the entry is dependent on another entry. In this case, Possen is dependent on Oberspier, which should be consulted for additional information.
Vgl Posen - A Vgl (Vergleiche) notation lists places with similar spellings that you may want to compare. In this case, you may want to try searching for Posen.