The Gazi Race (Turkish: "Gazi Koşusu" ) is a Turkish thoroughbred horse flat race that is established in honor of the founder of the Turkish Republic Gazi Mustafa Kemal.
 It is country's most prestigious horse racing event, which is held uninterruptedly since its establishment in 1927.
 Restricted to 22 three-year-old thoroughbred horses, it is raced clockwise at a distance of 2400 m on turf (grass) track at the Veliefendi Race Course in Istanbul.
Sirkeci (] ) is a quarter in the Eminönü neighborhood of the Fatih district of the city of Istanbul, Turkey.
 The neighborhood borders to the North the mouth of the Golden Horn, to the West the neighborhood of Bahçekapı, to the East the Topkapi Palace area, and to the South the Cağaloğlu neighborhood.
 Sirkeci hosts Sirkeci Station, the Southeastern (thus "Oriental") long distance passenger train terminus in Europe for the Orient Express.
Yasin Pilavcılar (born September 11, 1990, in Istanbul, Turkey) is a horse racing jockey, who is currently riding at Veliefendi Race Course in Istanbul, Turkey.
Veliefendi Race Course (Turkish: "Veliefendi Hipodromu" ) is a horse racing track located at Veliefendi neighborhood in Zeytinburnu district of Istanbul, Turkey.
The International Topkapi Trophy is a Group 2 flat horse race in Turkey open to horses aged three years or older.
 It is run at Veliefendi Race Course over a distance of 1,600 metres (about 1 mile), and it is scheduled to take place each year in early September.
 The race is part of Istanbul's International Racing Festival.
Postal museum is a Sri Lanka's national museum of post that located at the Postal Headquarters in Colombo, Sri Lanka.
 Firstly, the postal museum was functioned at the Central Telegraph Office during 1918–1925, and moved to General Post Office in 1994.
 Again, a national postal museum was opened on 6 July 2010.
The Istanbul Postal Museum, aka PTT Museum Istanbul (Turkish: "PTT İstanbul Müzesi" ), is a postal museum dedicated to the historical development of mail and telecommunication services in the Ottoman Empire and Turkey, exhibiting related equipment and instruments as well as a collection of postage stamps.
 It was established in 2000 by the Turkish Post, and is situated inside the Grand Post Office building at Sirkeci quarter of Fatih district in Istanbul, Turkey.
The Istanbul Grand Post Office, aka Istanbul Main Post Office, (Turkish: "Büyük Postane" ) is an office building for postal services located at Sirkeci quarter of Fatih district in Istanbul, Turkey.
 It was designed by architect Vedat Tek in and was constructed between 1905 and 1909.
 The four-story building houses a post office, the Sirkeci Post Office (Turkish: "Sirkeci PTT Merkezi" ), office space for regional administration and also since 2000 the Istanbul Postal Museum (Turkish: "PTT İstanbul Müzesi" ).
 It is Turkey's largest post office building.
The Postal Square Building (formerly the City Post Office) served as the main post office for the city of Washington, D.C., from the building's completion in 1914 to 1986.
 It now houses the National Postal Museum, the Bureau of Labor Statistics, and offices of the United States Senate.
 Architect Daniel Burnham designed the building in the Beaux-Arts style — the same style Burnham used for the neighboring Union Station.
 Construction for the Postal Square Building began in 1911 on a lot near the Capitol.
 Planning began with a 1901 proposal by the Senate Parks Commission.
 The commission called for three buildings to mark the northern end of the Capitol complex.
 While the first two buildings in the plan, Union Station and the Postal Square Building, were completed early in the 20th century, the 1901 plan would not be fully implemented until the completion of the Thurgood Marshall Federal Judiciary Building in 1992.
The Istanbul Railway Museum (Turkish: "İstanbul Demiryolu Müzesi" ) is a railway museum situated within the historic İstanbul Sirkeci Terminal at Sirkeci neighborhood of Fatih district in Istanbul, Turkey.
 Opened on September 23, 2005, the museum is owned and operated by the Turkish State Railways (TCDD).

Question: Which is located closer to the Grand Post Office building at Sirkeci quarter of Fatih district in Istanbul, Veliefendi Race Course or Istanbul Postal Museum
Answer: Istanbul Postal Museum