regio septem castra  => "Seven fortresses" => refers to the Transylvanian Saxons.
See https://en.wikipedia.org/wiki/Historical_names_of_Transylvania
and https://en.wikipedia.org/wiki/Transylvanian_Saxons

hic est p..s tra(n)ssilvana  qeusto ather..nias  dat...
?septo casta/easta? ungan u vocat.. ipazergiu