Question: Where is the Italian eyewear conglomerate based 
Context: Persol is an Italian luxury eyewear brand specializing in the manufacturing of sunglasses and optical frames.  It is one of the oldest eyewear companies in the world and is currently owned by the Luxottica group.  The name is derived from the Italian "per il sole", meaning "for the sun".  Formed in 1917 by Giuseppe Ratti, Persol originally catered to pilots and sports drivers.  Presently, the company is famous for its durable sports sunglasses.  Its trademark is the silver arrow (often referred to as the "Supreme Arrow"), and several of the company's glasses feature this symbol. RVS Eyewear was launched in 2006 as the first eyewear brand to be based out of Istanbul, Turkey.  Its founder, Vidal Erkohen, founded this company with a goal of bringing back the quality and originality that was put into the eyewear of the past.  Each RVS frame is custom made and assembled by hand. Ray-Ban is a brand of sunglasses and eyeglasses founded in 1937 by the American company Bausch & Lomb.  The brand is best known for their Wayfarer and Aviator lines of sunglasses.  In 1999, Bausch & Lomb sold the brand to the Italian eyewear conglomerate Luxottica Group, for a reported US$640 million. OPSM (Optical Prescription Spectacle Makers) is the largest retailer of eye glasses in Australia and New Zealand, with locations in Hong Kong, Singapore, and Malaysia as well.  The company was founded in Sydney in 1932, and publicly listed in 1953.  Italian eyewear giant Luxottica acquired a controlling interest in 2003.  At that time the company operated 461 stores under three brands (OPSM, Laubman & Pank, Budget Eyewear) in Australia, 35 stores in New Zealand (where they were market leader), 75 stores in Hong Kong and 12 in Singapore (under the Optical Shop brand), and 12 in Malaysia.  Recently, L.G.R srl is an Italian eyewear manufacturer of high-end glasses and sunglasses, started by Luca Gnecchi Ruscone in 2007. Pearle Optical is an American chain of eye care stores.  It was founded in 1961 by Stanley Pearle, an optometrist in Savannah, Georgia, United States.  He also founded Pearle Vision (market name in the United States) and its express store, Pearle Express, in the same year.  Stanley Pearle sold his stores to Grand Metropolitan conglomerate based in the United Kingdom.  6 years later Grand Metropolitan sold the stores in the United States, Canada and Puerto Rico to Cole National Corporation.  The Belgium stores were sold to GIB based in Belgium and the Dutch stores to HAL Investments based in the Netherlands.  HAL Investments bought the Belgium Stores 1 year later from GIB and merged both chains into Pearl Benelux.  The North American Pearle Vision stores are currently owned by the Italian company Luxottica after the takeover of Cole National Corporation in 1996. The Jaypee Group is a group conglomerate based in Noida, India.  It was founded by Jaiprakash Gaur which is involved in well diversified infrastructure conglomerate with business interests in Engineering & Construction, Power, Cement, Real Estate, Hospitality, Expressways, IT, Sports & Education (not-for-profit). Toms (stylized as TOMS) is a for-profit<ref name="Fairfield Citizen - For/Non Profit"> </ref> company based in Playa Del Rey, California.  The company was founded in 2006 by Blake Mycoskie, an entrepreneur from Arlington, Texas.  The company designs and sells shoes based on the Argentine alpargata design, eyewear, coffee, apparel, and handbags.  When Toms sells a pair of shoes, a new pair of shoes is given to an impoverished child, when Toms sells eyewear, part of the profit is used to save or restore eyesight for people in developing countries.  The company launched TOMS Roasting Co. in 2014, and with each purchase of TOMS Roasting Co.  coffee, the company works with other organizations that they refer to as "giving partners" to provide 140 liters of safe water, equal to a one week supply, to a person in need.  In 2015, TOMS Bag Collection was launched to help contribute to advancements in maternal health.  Purchases of TOMS Bags help provide training for skilled birth attendants and distribute birth kits containing items that help women practice safe childbirth. Luxottica Group S.p.A. is the world's largest eyewear company.  It is based in Milan, Italy. C. Russell Feldmann (1898 - Greenwich, Connecticut, December 13 1973) was an American businessman who in the 1930s built up a large conglomerate based on automobile radios. His first company, Winton Engine Company, was sold to Alfred P. Sloan and later became the diesel division of General Motors Corporation.  His second company Automobile Radio Corporation, grew into National Union Electric Corporation which included non-automobile divisions including Eureka Williams Company, Emerson Quiet Kool, and Napco Plastics and Advanced Science.
Answer: Milan, Italy.