With this 
								  publication I was given the opportunity to 
								  deepen, not having the scholars up to now well 
								  determined the reasons for why Diego Velázquez 
								  has painted, first He the work here examined 
								  and then with other copies, of various sizes, 
								  carried out in the shop by his collaborators, 
								  of: “Portrait of 
								  a knight of the Order of Calatrava. Don Martin 
								  de Leyva” and to 
								  investigate in the archives and libraries the 
								  contemporary manuscript and printed texts at 
								  the time.
								   I 
								  expanded what had been written before with the 
								  archival and bibliographic updates of both the 
								  works mentioned and the people.
								  It 
								  is good, therefore, to clarify that before 
								  starting to describe the historical-artistic 
								  path, to motivate and determine the 
								  authenticity of the painting, I referred to 
								  the examination carried out by prof. Maurizio 
								  Marini, an art expert, who, on March 25, 1998, 
								  authenticated the survey with his own 
								  signature in the back of the photo of the 
								  painting as a photo inserted in his catalog 
								  “Diego Velázquez, Electa, 1997”, in front of 
								  the Notary of Rome dott. Panvini Rosati, which 
								  corresponds to the expertise carried out by 
								  the same professor Maurizio Marini who 
								  accompanies the work. On 20 June 2009 the same 
								  professor Maurizio Marini, issued a valuable 
								  report on the painting that further confirms 
								  its authenticity. On behalf of the property, 
								  in order to better analyze the work, I was 
								  given the technical report on the state of 
								  conservation of the same that was carried out 
								  by Professor Giampaolo Ghislandi on December 
								  1, 2004. 
								  The 
								  painting in question is an oil on paper, 
								  applied on canvas (20 
								  5⁄64 
								  in. x 16 59⁄64 
								  in.), the work of the painter Diego Velázquez 
								  also published in the volume of Maurizio 
								  Marini in 19971 
								  which depicts a study for a 
								  Portrait of a Knight of the 
								  Order of Calatrava.
								  
								  
								  According to professor José López Rey2 
								  the identification derives from a coat of arms 
								  of the noble family of Murcia present in a 
								  version (oil on canvas, 38 
								  37⁄64 
								  in. x 30 5⁄16 
								  in.) conserved in New York, at the Hispanic 
								  Society of America and represents “Don 
								  Martìn de Leyva” 
								  mentioned in his reasoned volume on the 
								  Velázquez.
								  On 
								  this identification I have followed another 
								  additional historical-archival path that 
								  certifies the motivation of the four portraits 
								  of Martín de 
								  Leyva 
								  cataloged.
								  The 
								  other versions are: in Brescia, a collection 
								  of Conti Lecchi (oil on canvas, 41 
								  11⁄32 
								  in. x 35 7⁄16 
								  in., which comes from a collection of South 
								  Africa in 1947)3.
								  Then 
								  we have the version already (1936) in London, 
								  at the Vermeer Gallery, (with apocryphal 
								  additions, 28 
								  47⁄64 
								  in. x 21 27⁄32 
								  in. originally, 25 
								  25⁄32 
								  in. x 20 5⁄64 
								  in.) whose characteristic is to have as a 
								  basis the study in object (20 
								  5⁄64 
								  in. x 16 59⁄64 
								  in.) which, in 1929, was on the antique market 
								  in Venice and, in recent years, in a 
								  collection in Caracas (Venezuela)4.
								  The 
								  work in question is always a portrait of the 
								  knight of the Order of Calatrava (20 
								  5⁄64 
								  in. x 16 59⁄64 
								  in.), reported by Mayer in his 1936 catalog 
								  (he had seen the work) and by Rey (as written 
								  by Mayer) and it is inserted in its catalog 
								  raisonné of 1963, only from the examination of 
								  a photo; the painting was present in Venice in 
								  1929 and after a long period with an unknown 
								  location, appeared in a collection in Caracas, 
								  Venezuela5 
								  and then in Switzerland.
								  For 
								  this work we have the scientific-archival 
								  motivation that Diego Velázquez painted this 
								  portrait, under examination, commissioned by 
								  the sons of Martin, being this dead in 1600, 
								  and therefore could not be the direct 
								  commissioner. This is proven in the 
								  investigation done on the Leyva Family, on the 
								  Order of the Knights of Calatrava and Diego 
								  Velázquez.
								  With 
								  this publication, I pay homage to the Spanish 
								  master Velázquez and to his important and high 
								  artistic quality; and it is truly a pain to 
								  know that he, like Leonardo da Vinci, no 
								  longer has their own grave where I can deposit 
								  a bouquet of flowers. He died on 6 August 1660 
								  and was buried in Madrid in the crypt of the 
								  Fuensalida in the church of San Giovanni 
								  Battista. His wife Juana died only 7 days 
								  later and was buried next to him. 
								  Unfortunately, the church was destroyed by the 
								  French in 1811, so today we do not know 
								  exactly where his tomb is. Until the 
								  nineteenth century, the work of Velázquez 
								  remained little known outside of Spain and 
								  many of his paintings disappeared, stolen by 
								  French soldiers during the Spanish War of 
								  Independence.
								  
								  Furthermore, I wanted to pay tribute to the 
								  Order of Calatrava, founded during the 
								  Templars' period and whose founding monk is 
								  called as our artist: Diego Velázquez.