Young Israel Beth El of Borough Park, Brooklyn, was built 1920-1923, in a Semitic style that combined Moorish ornament with Judaic motifs. “This sanctuary provided a fitting backdrop for the world-renowned cantors who helped win the synagogue fame as ‘Brooklyn’s Carnegie Hall’” was printed in the Brooklyn (NY) Daily Eagle on May 30, 2024. It’s not known how long the synagogue has had this nickname.
 
The First Roumanian-American Congregation (Shaarey Shamoyim) at 89 Rivington Street, Manhattan, has been called the “Cantors’ Carnegie Hall.”
   
 
Wikipedia: Young Israel Beth El of Borough Park 
Young Israel Beth El of Borough Park, sometimes called Young Israel Beth El of Boro Park and abbreviated as YIBE, is an Orthodox Jewish congregation and historic synagogue, located at 4802 15th Avenue in Borough Park, Brooklyn, New York City, New York, United States.
 
Formed in the 1980s through a merger of Temple Beth El of Borough Park, established in 1902, and Young Israel of Boro Park, established c. 1930s, the merged congregation worships from the historic 1920s temple that was listed on the National Register of Historic Places in 2010.
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Beth-El was renown for its famous cantors.
 
Wikipedia: Carnegie Hall
Carnegie Hall (/ˈkɑːrnɪɡi/ KAR-nig-ee) is a concert venue in Midtown Manhattan, New York City. It is at 881 Seventh Avenue, occupying the east side of Seventh Avenue between 56th and 57th Streets. Designed by architect William Burnet Tuthill and built by industrialist and philanthropist Andrew Carnegie, it is one of the most prestigious venues in the world for both classical music and popular music. Carnegie Hall has its own artistic programming, development, and marketing departments and presents about 250 performances each season. It is also rented out to performing groups.
 
Brooklyn (NY) Daily Eagle
Synagogue named ‘Brooklyn’s Carnegie
Hall’ awarded Sacred Sites Grant
May 30, 2024 Brooklyn Eagle Staff
BOROUGH PARK—LIKE THE CONGREGATION IN PROSPECT HEIGHTS, YOUNG ISRAEL BETH EL OF BOROUGH PARK, the former Temple Beth-El of Borough Park, is an Orthodox synagogue that has been awarded $20,000 for masonry restoration. The synagogue was built just over a century ago. Architects Shampan and Shampan utilized a grand version of the “Semitic” style— combining Moorish ornament with Judaic motifs, a stylistic phenomenon that developed in mid-19th century Europe, and reached its greatest expression in the 1920s. Constructed in 1920-1923, the synagogue was described at the time by The New York Times as “a new house of worship of unusual beauty.” This sanctuary provided a fitting backdrop for the world-renowned cantors who helped win the synagogue fame as “Brooklyn’s Carnegie Hall.”
   
Jewish Telegraphic Agency
3 historic NYC synagogues receive grants for renovation projects
By Julia Gergely May 30, 2024 6:32 pm
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Young Israel Beth El, an Orthodox synagogue in Borough Park, was granted $20,000 towards masonry restoration. The building, located at 4802 15th Ave., was designed in 1923 with acoustics in mind. It has been called “Brooklyn’s Carnegie Hall” for its history of inviting renowned cantors to pray at its pulpit during the golden age of “hazzanut,” or florid cantorial music. The synagogue reaches 1,200 people a year through services, Talmud study groups, community programs and concerts. The congregation hosts a popular “Shabbos Mevarchim” service led by its famed cantor Benzion Miller, on the last Shabbat of every month. The building was added to the National Register of Historic Places in 2010.