The Stattkus-Verzeichnis (SV) is a catalogue of the musical compositions of the Italian composer Claudio Monteverdi.
 The catalogue was published in 1985 by Manfred H. Stattkus ("Claudio Monteverdi: Verzeichnis der erhaltenen Werke").
 A free, basic second edition of the catalogue is available online.
Monteverdi is a crater on Mercury.
 It has a diameter of 138 kilometers.
 Its name was adopted by the International Astronomical Union in 1979.
 Monteverdi is named for the Italian composer Claudio Monteverdi, who lived from 1567 to 1643.
Taverner is an opera with music and libretto by Peter Maxwell Davies.
 It is based on the life of the 16th-century English composer John Taverner, but in what Davies himself acknowledged was a non-realistic treatment.
 The gestation for the opera dated as far back as 1956 during Davies's years in Manchester, and continued when he went to Princeton University in 1962.
 Davies produced several instrumental works related to the opera during this gestation period, including the "Points and Dances from 'Taverner and the "Second Fantasia on John Taverner's "In Nomine"".
 Davies had completed the opera in 1968, but lost parts of the score in a fire at his Dorset cottage in 1969, which necessitated recomposition.
Sir Peter Maxwell Davies (8 September 1934 – 14 March 2016) was an English composer and conductor.
 In 2004 he was made Master of the Queen's Music.
The Martyrdom of St Magnus is a chamber opera in one act (with nine scenes) by the British composer Peter Maxwell Davies.
 The libretto, by Davies himself, is based on the novel "Magnus" by George Mackay Brown.
 The opera was first performed in St. Magnus Cathedral, Kirkwall, Orkney on 18 June 1977.
Neil Mackie (born 1946) is a Scottish tenor.
 During his career as a singer, he was associated with the works of 20th-century composers, particularly Benjamin Britten, and Peter Maxwell Davies.
 He created the title role in Davies's opera "The Martyrdom of St Magnus" and Sandy in his "The Lighthouse" and performed in the world premieres of Davies's "Into the Labyrinth", cantata for tenor and chamber orchestra, and "The Jacobite Rising".
 He has also premiered vocal works by Elliott Carter ("In Sleep, in Thunder"), Hans Werner Henze ("Three Auden Songs") and songs by Benjamin Britten.
Il ballo delle ingrate ("The Ballet of the Ungrateful Ladies") is a semi-dramatic ballet by the Italian composer Claudio Monteverdi set to a libretto by Ottavio Rinuccini.
 It was first performed in Mantua on Wednesday, 4 June 1608 as part of the wedding celebrations for Francesco Gonzaga (the son of Monteverdri's patron Duke Vincenzo of Mantua) and Margaret of Savoy.
 Both Vincenzo and Francesco Gonzaga took part in the dancing.
 Monteverdi also composed the opera "L'Arianna" (to another libretto by Rinuccini) and the music for the prologue to Guarini's play "L'idropica" for the occasion.
Giulio Cesare Monteverdi (1573–1630/31) was an Italian composer and organist; he was the younger brother of Claudio Monteverdi.
Claudio Giovanni Antonio Monteverdi (] ; 15 May 1567 (baptized) – 29 November 1643) was an Italian composer, string player and choirmaster.
 A composer of both secular and sacred music, and a pioneer in the development of opera, he is considered a crucial transitional figure between the Renaissance and the Baroque periods of music history.
Monteverdi Peninsula ( ) is a large ice-covered peninsula lying between the Bach Ice Shelf and George VI Sound, forming the southernmost extremity of Alexander Island, Antarctica.
 The southern side of the feature was first seen and charted by Finn Ronne and Carl Eklund of the United States Antarctic Service, 1939–41, who traversed the entire length of George VI Sound.
 The peninsula was mapped from trimetrogon air photography taken by the Ronne Antarctic Research Expedition in 1947–48, and from survey by the Falkland Islands Dependencies Survey, 1948-50.
 It was named by the UK Antarctic Place-Names Committee after Italian composer Claudio Monteverdi.

Question: Who was an Italian composer, Claudio Monteverdi or Peter Maxwell Davies?
Answer: Claudio Giovanni Antonio Monteverdi