Question: The Pantages Theatre hall's ceiling was decorated with a skylight by what American luxury jewelry and specialty retailer?
Context: The Hollywood Pantages Theatre, formerly known as RKO Pantages Theatre, is located at Hollywood and Vine (6233 Hollywood Boulevard), in Hollywood.  Designed by architect B. Marcus Priteca, it was the last theater built by the vaudeville impresario Alexander Pantages.  The palatial Art Deco theater opened on June 4, 1930, as part of the Pantages Theatre Circuit. The Pantages Theatre is an historic theater in Salt Lake City, Utah in the United States of America.  It opened in 1918 as the Pantages Theater, after the name of its owner, Alexander Pantages.  Babe Ruth performed there in 1927.  Abbott and Costello, Will Rogers, and many other celebrities also performed in the theater during its heyday.  Formerly also known as the RKO Orpheum and later as the Utah Theater, it was built in 1918.  The theater was originally built for vaudeville at the princely sum of over two million dollars, making it among the most expensive and opulent structures in the Pantages theater chain.  The structure, designed by celebrated architect B. Marcus Priteca, was built in the interior of a city block, and reached by long grand gallery extending to Main Street.  The interior lobby was done in an exotic neo-classical style, [the touted Pantages Greek] with ornate plaster work, an inlaid marble floor, and ramps ascending to the mezzanine level.  The interior was accented with Alaskan marble and faux tile.  The auditorium's proscenium was flanked with marble columns and gilded opera boxes.  The hall's ceiling was decorated with a Tiffany skylight.  The main floor of the auditorium seated 1700, and the balcony accommodated an additional 600 patrons.  The theater functioned as a vaudeville venue through the 1920s, before being converted into a movie palace during the 1930s.  Through most of the decade, the theater was owned by Radio-Keith Orpheum and was renamed the RKO Orpheum.  By 1937, however, it had taken the name the Utah Theater, which has endured to the present.  One of the highlights of the Utah as a movie venue was during the mid-1960s, when the Sound of Music had a run in the theater that lasted two years.  In 1968, the theater was split into upper and lower levels, with the balcony being transformed into a second auditorium.  This architectural arrangement, commonly known as "piggybacking," was frequently imposed on older traditional theaters during the 1960s and early 1970s.  With this transformation, an escalator ascended from the Utah's mezzanine to the top rows of the balcony.  During the remodeling the proscenium, box seating and some of the elaborate ornamentation was removed.  In 1988, the structure ceased operation as a movie theater, and was used by local dance company until 1992, when the building was sold.  After passing through the hands of various owners, the vacant building was purchased by the Salt Lake City Redevelopment Agency in 2009.  At this time there are no definitive plans for the future of this theater. Blue Nile is an online specialty retailer of fine jewelry.  Blue Nile was founded in 1999 and today is the largest online retailer of diamonds.  Blue Nile is based in Seattle, Washington and competes with traditional jewelry stores such as Tiffany & Co., and online retailer stores such as James Allen, Belgium Diamonds, Ringsberry.com. The SHN Orpheum Theatre, originally the Pantages Theatre, is located at 1192 Market at Hyde, Grove and 8th Streets in the Civic Center district of San Francisco, California.  The theatre first opened in 1926 as one of the many designed by architect B. Marcus Priteca for theater-circuit owner Alexander Pantages.  The interior features a vaulted ceiling, while the facade was patterned after a 12th-century French cathedral.  The Orpheum seats 2,203 patrons.  In 1998, after a previous renovation in the 1970s, a $20 million renovation was completed to make the Orpheum more suitable for Broadway shows.  The theatre is a locally designated San Francisco landmark as determined by the San Francisco Landmarks Preservation Advisory Board. The Pantages Theatre is an historic theatre in Minneapolis, Minnesota.  The original building was a Beaux-Arts style twelve-story complex on Hennepin Avenue, designed by Kees & Colburn and operated by Alexander Pantages, a Greek immigrant who opened 500 theatres. Tiffany & Company (known colloquially as Tiffany or Tiffany's) is an American luxury jewelry and specialty retailer, headquartered in New York City. eClarity Pte Ltd is an online specialty retailer of jewelry.  eClarity was registered in year 2000 and today owns an online diamonds database with more than 20,000 pieces of diamonds, 400 designs of wedding bands, and other jewelry.  eClarity is based in Singapore, and competes with traditional jewelry retail chain stores, and global online retailer stores such as ringsberry and Blue Nile Inc..  The key feature of eClarity is customization of engagement ring, wedding jewelry, and wide range of online database of diamonds. The Pantages Theatre in Vancouver, BC's Downtown Eastside neighbourhood, was built by Alexander Pantages in 1907 and was considered the oldest remaining vaudeville theatre in Canada.  It was listed on Heritage Canada's 2009 Top Ten Most Endangered Places List and the Vancouver Heritage Register as a heritage building.  It had been vacant since 1994.  On 30 September 2008, Vancouver City Council refused the proposal to restore the 650-seat Pantages Theatre, and similarly refused the blackbox studio, art gallery, and 136 units of housing associated with the venture.  Since that time, the entire half block had been put up for sale.  It was the oldest surviving Pantages Theatre in Western Canada.  After the City of Vancouver rejected the renewal proposal the roof of the building collapsed due to the weight of years of water collection.  Demolition began in April 2011.  There are currently no plans to redevelop the site. Marcus & Co. was an American luxury jewelry retailer from 1892 to 1962 in New York City. Kuhn & Komor, also known colloquially as "K&K", was a Hungarian multinational luxury jewelry and specialty retailer, having headquarters in Shanghai, China.  K&K produced jewelry, sterling silver, china, crystal, stationery, and personal accessories.  K&K was renowned in East Asia for its luxury goods, also being called the "Asprey of Asia."
Answer: Tiffany & Company