Question: What  area was named "Victoria Square" by the Street Naming Committee on 23 May 1837, after Princess Victoria, that has colonial-era building in the Adelaide city centre across from King William Street ?

Context paragraphs:
General Post Office, Adelaide: Adelaide's General Post Office is a colonial-era building in the Adelaide city centre.  It is located at 141 King William Street on the north-west corner of King William Street and Victoria Square.

Pirie Street, Adelaide: Pirie Street is a road on the east side of the centre of Adelaide, the capital of South Australia.  It runs east-west, between East Terrace and King William Street.  After crossing King William Street, it continues as Waymouth Street.  It forms the southern boundary of Hindmarsh Square which is in the centre of the north-east quadrant of the city centre.

Whitmore Square: Whitmore Square is a public square in the centre of the south-western quarter of the Adelaide city centre.  It surrounds the intersection of Sturt and Morphett Streets.  It was named by the Street Naming Committee after William Wolryche Whitmore, a British Member of Parliament who introduced the South Australia Foundation Act to the British House of Commons.  It is also known as "Ivaritji", a Kaurna name meaning "gentle, misty rain."  Ivaritji (1847? -1929), also known as Amelia Taylor, was the (then) last remaining speaker of the Kaurna language.

Street Naming Committee (Adelaide): The Street Naming Committee was set up to decide the names of the streets, the squares and the river of the new settlement of Adelaide, South Australia, as it had been laid out by Colonel William Light in 1837.  Light's map corresponds to the modern Adelaide city centre and North Adelaide.  The committee met on 23 May 1837.

Currie Street, Adelaide: Currie Street is a main street in the Adelaide city centre, in Adelaide, South Australia.  It runs east–to–west from King William Street, through Light Square, to West Terrace on the western edge of the city centre.

Victoria Square, Adelaide: Victoria Square, also known as Tarntanyangga or Tarndanyangga , is a public square in the South Australian capital of Adelaide.  The area was named "Victoria Square" by the Street Naming Committee on 23 May 1837, after Princess Victoria, then heir presumptive of the British throne.  Less than a month later the King died and Victoria became Queen.  The Kaurna people know the area as Tarndanyangga, "The Dreaming Place of the Red Kangaroo".  In line with the Adelaide City Council's recognition of Kaurna country, the area is officially referred to as Victoria Square/Tarndanyangga.  The square was upgraded in 2014, new lighting was added and the fountain was moved from the northern end to the southern tip of the square.  During the Christmas period, it is traditional for a 24.5 m high Christmas tree to be erected in the northern part of the square.

115 King William Street: 115 King William Street is a high-rise building located on King William Street in the Adelaide city centre.  It rises 87 metres to the roof and 90 metres to the antenna spire.  The building has 26 storeys.  Construction of the building began in 2015 and was completed in 2016.  115 King William Street is the sixth tallest building in Adelaide.

Gilles Street, Adelaide: Gilles Street ( ) is a street in the south-eastern sector of the centre of Adelaide, South Australia.  It runs east-west between East Terrace and King William Street, crossing Hutt Street and Pulteney Street.  It was named after Osmond Gilles, an early treasurer of the colony of South Australia on 23 May 1837.

Hindmarsh Square: Hindmarsh Square is a public square in Adelaide, South Australia.  It is located in the centre of the north-eastern quarter of the city, and surrounds the intersection of Grenfell and Pulteney Streets, near the eastern end of the Rundle Mall.  Pirie Street forms the southern boundary of the square.  It was named by the Street Naming Committee after John Hindmarsh, the first Governor of South Australia.

King William Street, Adelaide: King William Street is the part of a major arterial road that traverses the CBD and centre of Adelaide (the capital of South Australia).  It was named by the Street Naming Committee on 23 May 1837 after King William IV, the then reigning monarch, who died within a month.  King William Street is approximately 40 m wide, and is the widest main street of all the Australian State capital cities, which are significantly narrower by comparison.  It is historically considered one of Adelaide's high streets, for its focal point of businesses, shops and other prominent establishments.

Supporting paragraphs: General Post Office, Adelaide Victoria Square, Adelaide
Answer: Victoria Square