Maria Theresa reigned for 30 years.
Scipione -LRB- HWV 20 -RRB- - or Publio Cornelio Scipione - is an opera seria in three acts , with music composed by George Frideric Handel for the Royal Academy of Music -LRB- 1719 -RRB- in 1726 .. HWV. HWV. opera seria. opera seria. George Frideric Handel. George Frideric Handel. The librettist was Paolo Antonio Rolli .. Paolo Antonio Rolli. Paolo Antonio Rolli. Handel composed Scipione whilst in the middle of writing Alessandro .. Alessandro. Alessandro ( opera ). It was based upon the life of Roman General Scipio Africanus .. Scipio Africanus. Scipio Africanus. Its slow march is the regimental march of the Grenadier Guards and is played at London Metropolitan police passing out ceremonies .. march. March ( music ). Grenadier Guards. Grenadier Guards