Question: Red Velvet is a play about the only actor of African-American descent among the 33 actors of the English stage honored with bronze plaques at what theatre?

Context articles: Jubilee 150 Walkway
Celtiberian language
Ira Aldridge
West Hollywood Memorial Walk
Oldham War Memorial
Southern Gospel Museum and Hall of Fame
Red Velvet (play)
Botorrita plaque
Crewe War Memorial
Korean War Memorial Wall (Canada)

The Jubilee 150 Walkway, also variously known as the Jubilee 150 Commemorative Walk, the Jubilee 150 Walk, and the Jubilee Walk, is a series of (initially) 150 bronze plaques set into the pavement of North Terrace, Adelaide.
 It was officially opened on 21 December 1986.
 It was commissioned as part of the celebrations commemorating the 150th anniversary of the founding of the state of South Australia.
 The plaques contain the names and deeds of (initially) 170 people who made major contributions to the founding and development of South Australia.
 Since 1986, the Adelaide City Council has added four plaques.
Celtiberian or Northeastern Hispano-Celtic is an extinct Indo-European language of the Celtic branch spoken by the Celtiberians in an area of the Iberian Peninsula lying between the headwaters of the Duero, Tajo, Júcar and Turia rivers and the Ebro river.
 This language is directly attested in nearly 200 inscriptions dated to the 2nd century BC and the 1st century BC, mainly in Celtiberian script, a direct adaptation of the northeastern Iberian script, but also in Latin alphabet.
 The longest extant Celtiberian inscriptions are those on three Botorrita plaques, bronze plaques from Botorrita near Zaragoza, dating to the early 1st century BC, labelled Botorrita I, III and IV (Botorrita II is in the Latin language).
 In the northwest was another Celtic language, Northwestern Hispano-Celtic, that was somewhat related to Celtiberian.
Ira Frederick Aldridge (July 24, 1807 – August 7, 1867) was an American and later British stage actor and playwright who made his career after 1824 largely on the London stage and in Europe, especially in Shakespearean roles.
 Born in New York City, Aldridge is the only actor of African-American descent among the 33 actors of the English stage honored with bronze plaques at the Shakespeare Memorial Theatre at Stratford-upon-Avon.
 He was especially popular in Prussia and Russia, where he received top honors from heads of state.
West Hollywood Memorial Walk (Memorial Walk) is a memorial and landmark in West Hollywood, California, along the sidewalks of Santa Monica Boulevard between Fairfax Avenue and Doheny Drive, at the eastern border of the City of Beverly Hills.
 Bronze plaques engraved with the names of those who died from acquired immune deficiency syndrome (AIDS) are embedded in the sidewalk as a tribute.
 Funds from the purchase of plaques support the programs of California non-profit Aid For AIDS to assist impoverished people in Los Angeles County living with HIV/AIDS.
Oldham War Memorial is a war memorial in Oldham, England, comprising a large bronze sculpture group on a granite plinth.
 It was built to commemorate the men of Oldham who were killed in the First World War.
 Bronze plaques on the wall of the churchyard nearby list the fallen, including Mabel Drinkwater, a nurse who died after an operation at Oldham Royal Infirmary.
 A mechanised roll of honour was added in the 1950s, listing the men from Oldham who were killed in the Second World War.
 The memorial became a Grade II listed building in 1973.
 The listing was upgraded to Grade II* in December 2016.
The Southern Gospel Museum and Hall of Fame is a site operated at Dollywood, in Pigeon Forge, Tennessee, by the Southern Gospel Music Association.
 It was established in 1997.
 The Hall of Fame is composed of pioneers in the field of Southern gospel music; members are selected by the SGMA annually, and are honored by a descriptive plaque and portrait in the Hall itself.
 The Museum contains thousands of items of memorabilia and a gift shop.
 An animatronic quartet, sponsored by Bill Gaither, sings “Give the World a Smile.”
 Other interesting items on display include a replica of the Blackwood Brothers first bus, interactive video and sound clips, and bronze plaques of Hall of Fame inductees.
 Over one million people visit the facility annually.
Red Velvet is a 2012 play by Lolita Chakrabarti, dealing with the biography of the 19th century actor Ira Aldridge and his taking the role of "Othello".
 It premiered at the Tricycle Theatre (directed by its new artistic director Indhu Rubasingham) from 11 October to 24 November 2012, with Aldridge played by Adrian Lester.
The Botorrita plaques are four bronze plaques discovered in Botorrita (Roman "Contrebia Belaisca"), near Zaragoza, Spain, dating to the early 1st century BC, known as Botorrita I, II, III and IV.
Crewe War Memorial stands in the Municipal Square, in Crewe, Cheshire, England.
 It consists of a bronze sculpture of Britannia standing on a pedestal, itself on a square base.
 The sculptor was Walter Gilbert and the sculpture was cast in the foundry of H. H. Martin and Company.
 It was unveiled in 1924.
 The names of those killed in both world wars and in later conflicts are inscribed on bronze plaques around the base, and there are further inscriptions on the paving around the memorial.
 It originally stood in Market Square and was moved to Municipal Square (which was renamed as Memorial Square on November 11 2014) in 2006.
 The memorial is recorded in the National Heritage List for England as a designated Grade II listed building.
The Korean War Memorial Wall at Meadowvale Cemetery in Brampton, Ontario commemorates those who served Canada in the Korean War.
 It is a curved 200 ft long polished granite wall.
 It contains 516 bronze plaques, one for each of the volunteer Canadian soldiers who died in Korea.
 A central bronze feature lists all of the Canadian Military Units which served in the War.