Question: This musical, for which Howard Da Silva was nominated for a 1960 Tony Award as Best Featured Actor in a Musical, is one of only nine musicals to win what prize?

Context articles: Tom Bosley
Nick Cordero
The Magic Show
1776 (film)
Howard Da Silva
The Underworld Story
Michael Cerveris
Fiorello!
Joel Blum
Micki Grant

Thomas Edward Bosley (October 1, 1927 – October 19, 2010) was an American actor, voice artist, television personality, and entertainer.
 Bosley is best known for portraying Howard Cunningham on the long-running ABC sitcom "Happy Days", and the title character on the NBC/ABC series "Father Dowling Mysteries".
 He also was featured in a recurring role on "Murder, She Wrote".
 He originated the title role of the Pulitzer Prize–winning Broadway musical "Fiorello!
", earning the 1960 Tony Award for Best Performance by a Featured Actor in a Musical.
Nick Cordero is a Canadian actor.
 He appeared on Broadway in 2014 in the musical "Bullets Over Broadway" in the role of Cheech, for which he was nominated for the Tony Award for Best Featured Actor in a Musical and the Drama Desk Award for Outstanding Featured Actor in a Musical.
 He won the Outer Critics Circle Award for Outstanding Featured Actor in a Musical and a Theater World Award for the role.
 He originated the title role in the Off-Broadway production of "The Toxic Avenger".
 He also played the role of Dennis in "Rock of Ages" on Broadway in 2012 and on tour.
 In March 2016, he joined the Broadway production of "Waitress", playing the role of Earl.
 He left "Waitress" to join the Broadway premier of the musical "A Bronx Tale", as "Sonny" at the Longacre Theatre starting on November 3, 2016.
The Magic Show is a one-act musical with music and lyrics by Stephen Schwartz and a book by Bob Randall.
 It starred magician Doug Henning.
 Produced by Edgar Lansbury, it opened on May 28, 1974 at the Cort Theatre in Manhattan, and ran for 1,920 performances, closing on December 31, 1978.
 Henning was nominated for the Tony Award for Best Featured Actor in a Musical and director Grover Dale was nominated for the Tony Award for Best Direction of a Musical.
1776 is a 1972 American musical drama film directed by Peter H. Hunt.
 The screenplay by Peter Stone was based on his book for the 1969 Broadway musical of the same name.
 The song score was composed by Sherman Edwards.
 The cast included William Daniels, Howard Da Silva, Donald Madden, John Cullum, Ken Howard and Blythe Danner.
Howard Da Silva (May 4, 1909 – February 16, 1986) was an American actor, director and musical performer on stage, film, television and radio.
 He was cast in dozens of productions on the New York stage, appeared in more than two dozen television programs, and acted in more than fifty feature films.
 Adept at both drama and musicals on the stage, he originated the role of Jud Fry in the original 1943 run of the Rodgers and Hammerstein musical "Oklahoma!
", and also portrayed the prosecuting attorney in the 1957 stage production of "Compulsion".
 Da Silva was nominated for a 1960 Tony Award as Best Featured Actor in a Musical for his work in "Fiorello!
", a musical about New York City mayor LaGuardia.
 In 1961, Da Silva directed "Purlie Victorious", by Ossie Davis.
The Underworld Story is a 1950 American film noir crime film directed by Cy Endfield starring Dan Duryea, Herbert Marshall, Gale Storm, Howard Da Silva and Michael O'Shea.
 Da Silva plays the loud-mouthed gangster Carl Durham, one of his last roles before becoming blacklisted.
Michael Cerveris (born November 6, 1960) is an American actor, singer, and guitarist.
 He has performed in many stage musicals and plays, including several Stephen Sondheim musicals: "Assassins", "Sweeney Todd", "Road Show", and "Passion".
 In 2004, Cerveris won the Tony Award as Best Featured Actor in a Musical for "Assassins" as John Wilkes Booth.
 In 2015, he won his second Tony Award as Best Actor in a Musical for "Fun Home" as Bruce Bechdel.
Fiorello!
 is a musical about New York City mayor Fiorello H. LaGuardia, a reform Republican who took on the Tammany Hall political machine.
 The book is by Jerome Weidman and George Abbott, drawn substantially from the 1955 volume "Life with Fiorello" by Ernest Cuneo, with lyrics by Sheldon Harnick, and music by Jerry Bock.
 It is one of only nine musicals to win the Pulitzer Prize for Drama.
Joel Blum is an American stage actor.
 He was nominated for the Tony Award for Best Featured Actor in a Musical twice.
 The first was in 1995 for his role as Frank in the Broadway revival of "Show Boat".
 The second nomination was in 1997 for playing Buddy Becker in the original production of "Steel Pier".
 He was also nominated for the Drama Desk Award for Outstanding Featured Actor in a Musical for his role in "Golf: The Musical".
 He was also part of the original production of "42nd Street".
 Other Broadway roles include "Stardust, The Music Man" and "Debbie Reynolds On Broadway".
 He also played George in the second U.S. national tour of "Billy Elliot the Musical".
, and Detective Marks/Man in the Off-Broadway musical "Kid Victory".
.
Micki Grant (born June 30, 1941 ) is an American singer (soprano), actress, writer and composer.
 She performed in "Having Our Say" (as Sadie Delaney), "Tambourines to Glory" and "Jericho-Jim Crow", "The Gingham Dog", "Don't Bother Me, I Can't Cope" and has received three Tony Award nominations for her writing.
 In the early 1960s, she appeared off-Broadway in Jean Genet's "The Blacks" (with James Earl Jones and Cicely Tyson), and in "Brecht on Brecht", in which she sang (among other things) "Pirate Jenny".
 In 1964, Grant appeared as 'Ella Hammer' in the Howard da Silva's off-Broadway revival of Marc Blitzstein's "The Cradle Will Rock", opposite Jerry Orbach and Rita Gardner.
 In 1965, Micki Grant became one of the first African-American cast members of a daytime soap opera (preceded by Rex Ingram on "The Brighter Day", when she played the role of legal secretary Peggy Harris Nolan on NBC's "Another World".
 She later appeared on ABC's "The Edge of Night", replacing Billie Allen as Ada Chandler.