Question: Which building was existed first, 53W53 or 56 Leonard Street?

Context paragraphs:
Former New York Life Insurance Company Building: The Former New York Life Insurance Company Building, also known as the Clock Tower Building, was built as an office building located at 346 Broadway (with a secondary address of 108 Leonard Street) between Catherine Lane and Leonard Street, in Manhattan, New York City.  Constructed in two stages, from 1868 to 1870 and from 1894 to 1899, it is a New York City Landmark and is listed on the U.S. National Register of Historic Places.

Varick Street: Varick Street runs north-south primarily in the Hudson Square district of Lower Manhattan in New York City.  Varick Street's northern terminus is in the West Village, where it is a continuation of Seventh Avenue South south of Clarkson Street.  It continues downtown through Hudson Square and TriBeCa until it reaches Leonard Street, where it merges with West Broadway.  Motor traffic is one-way southbound.  Major east-west streets crossed include Houston Street and Canal Street.  Approaching Broome Street, the two rightmost lanes of Varick Street are reserved for traffic entering the Holland Tunnel, where backups often occur at rush hour.

Titus Andronicus (ballad): "The Lamentable and Tragical History of Titus Andronicus," also called "Titus Andronicus' Complaint," is a ballad from the 17th century about the fictional Roman general, Titus, and his revenge cycle with the Queen of the Goths.  Events in the ballad take place near the end of the Roman Empire, and the narrative of the ballad parallels the plot of William Shakespeare's play "Titus Andronicus".  Scholarly debate exists as to which text may have existed first, the ballad or the play (indeed, there is a third potential "Titus Andronicus" source, a prose history published in chapbook form during the 18th century).  The ballad itself was first entered on the Stationers' Register in 1594, the same year the play was entered.  Surviving copies of the ballad can be found in the British Library, in the Huntington Library, and at Magdalene College, Cambridge.  Online copies of the facsimiles are also available for public consumption at sites such as the English Broadside Ballad Archive.

53W53: 53W53, also known as the MoMA Expansion Tower and 53 West 53rd Street, and formerly known as Tower Verre is a supertall skyscraper currently under construction by the real estate companies Hines, Pontiac Land Group and Goldman Sachs, located in Midtown Manhattan, New York City adjacent to The Museum of Modern Art.  The building had been in development since 2006, and construction began in late 2014.

56 Leonard Street: 56 Leonard Street is an 821 ft tall, 57-story skyscraper on Leonard Street in Tribeca, New York City, United States.  Herzog & de Meuron describes the building as "houses stacked in the sky."  It is the tallest structure in Tribeca.

Oxford Research Group: Oxford Research Group (ORG) is a London-based charity and think tank at 56-64 Leonard Street, London EC2A 4LT, working on peace, security and justice issues.  Its research and dialogue activities are mainly focused on the Middle East, North and West Africa, as well as influencing UK and international security policy.

Whitefield's Tabernacle, Moorfields: Whitefield's Tabernacle, Moorfields (also known as Moorfields Tabernacle) is a former church at the corner of Tabernacle Street and Leonard Street, Moorfields, London, England.  The first church on the site was a wooden building erected by followers of the evangelical preacher George Whitefield in 1741.  This was replaced by a brick building in 1753.  John Wesley preached a sermon "On the death of the Rev Mr George Whitefield" both here and at Whitefield's Tabernacle, Tottenham Court Road in 1770.

Kitchen, Montross &amp; Wilcox Store: The Kitchen, Montross & Wilcox Store at 85 Leonard Street between Broadway and Church Street in the TriBeCa neighborhood of Manhattan, New York City was built in 1861 in the Italianate style for a company which dealt in dry goods.  The cast iron for the building's facade came from James Bogardus' ironworks, one of the few surviving buildings for which that is the case.  The building's columns are referred to as "sperm-candle style" from their resemblance to candles made from spermaceti.

Appleton Building: The Appleton Building occupied the front of a small block which was bounded by Broadway (Manhattan), Leonard Street, and Catharine Alley in New York City.  It stood at 346 and 348 Broadway, was four stories tall, and was constructed entirely of brown stone.  It was a familiar landmark in a quickly changing Broadway of the mid-19th century.  It was one of Broadway's oldest buildings.

Stinson Leonard Street: Stinson Morrison Hecker was a Kansas City, Missouri-based law firm.  On January 1, 2014, the firm completed its merger with Minneapolis, Minn.-based Leonard Street Deinard LLP, creating Stinson Leonard Street LLP, a law firm with offices in 14 cities and more than 520 attorneys.

Supporting paragraphs: 53W53 56 Leonard Street
Answer: 56 Leonard Street