Together with the “Weissbuch” (KU 4a), this urbarium offers a
comprehensive overview of the rights and possessions of the
Cistercian Abbey, which reached its economic peak in the second
half of the 15th century. Copies of documents and compilations of
rights and dues, organized according to geographic criteria,
demonstrate the size of the abbey’s possessions. The
“Schwarzbuch” contains sources regarding possessions in the
administrative area of Zofingen and Sursee, which reached into the
Canton of Solothurn and the Basel area. After the dissolution of
the monastery, this volume, along with the monastery archives,
became part of the state archives in 1848.