It was restored to the Habsburg Monarchy by the Congress of Vienna.

Entity and relation annotations:
id: 0
type: entity
value: text: the Congress of Vienna
labels: <Organization>
id: 1
type: entity
value: text: Vienna
labels: <Location>
id: 2
type: entity
value: text: the Habsburg Monarchy
labels: <Organization>
type: relation
to_id: 1
labels: Organization:located_in:Location
from_id: 0