Apart from the only Dutch pope, another pope with this name took the radical step of placing Rome under interdiction during Holy Week in order to weaken Arnold of Brescia and the Commune of Rome.
The first pope of this name minted the earliest known papal coins and was in power when King Desiderius of the Lombards threatened Rome, forcing that pope to invite Charlemagne's invasion of Italy. Another pope with this name had earlier sparked the Comuneros Rebellion when Charles V appointed him regent of Spain. Apart from the only Dutch pope, another pope with this name took the radical step of placing Rome under interdiction during Holy Week in order to weaken Arnold of Brescia and the Commune of Rome. That pope, a contemporary of Frederick Barbarossa, also issued the bull Laudabiliter which condemned the Synod of Kells held by the Celtic Church and authorized Henry II to invade Ireland. For 10 points, give this papal name used by Nicholas Breakspear, the last English pope.
The first pope of this name minted the earliest known papal coins and was in power when King Desiderius of the Lombards threatened Rome, forcing that pope to invite Charlemagne's invasion of Italy.
Adrian [or Hadrianus]