British Theologian Adam Clarke writing in 1825 stated that the 1260-year period should commence with 755 AD, the actual year Pepin the Short invaded Lombard territory, resulting in the Pope's elevation from a subject of the Byzantine Empire to an independent head of state. The Donation of Pepin, which first occurred in 754 and again in 756 gave to the Pope temporal power over the Papal States. However, his introductory comments on Daniel 7 added 756 as an alternative commencement date. In April of that year, Pepin, accompanied by Pope Stephen II entered northern Italy from France, forcing the Lombard King Aistulf to lift his siege of Rome, and return to Pavia. Following Aistulf's capitulation, Pepin remained in Italy until finalizing his Donations. Based on this, 19th century commentators anticipate the end of the Papacy in 2016: