Question: How tall was the tallest building in Manchester, New Hampshire before the current tallest took that title?

Context paragraphs:
The Leonardo (Sandton): The Leonardo is an under construction 42 floor mixed-use property development that, when completed, will be the tallest building in Sandton, exceeding 143 m , which is the height of the current tallest building in Sandton.  The building is being built at 75 Maude street, approximately 100 metres from the Johannesburg Stock Exchange in Sandton, South Africa.  It has been proposed that the building be 238 m , which will make it the tallest building in South Africa.

List of tallest buildings in Ireland: This is a list of the tallest buildings on the island of Ireland.  The island of Ireland remains one of the world's lowest occupiers of skyscrapers and tall buildings, however, as of 2017, there are plans proposed to change this, backed by politicians, businesses and ordinary people.  These plans focus on Ireland's cities; Limerick, Cork, Galway and Dublin.  The island's first tall building was Liberty Hall, built in 1965 and stands at 59.4m (154 feet).  The current tallest building on the island is the Obel Tower in Belfast, which was completed in 2010, with the tallest in the Republic of Ireland being The Elysian in Cork, which finished in 2008.  Capital Dock in Dublin, standing at 78 metres, is expected to replace The Elysian as the Republic's tallest building when completed in 2017, also becoming the third tallest on the island.  It is located in Dublin Docklands and includes offices, residential elements and retail.

City Hall Plaza (Manchester): City Hall Plaza, City Hall Plaza Tower or 900 Elm Street (U.S. Route 3), is a prominent 275 ft office tower in Manchester, New Hampshire.  Since its completion in 1992, City Hall Plaza has been the tallest building in the city of Manchester, the state of New Hampshire, and northern New England (the states of New Hampshire, Maine, and Vermont).  It is shorter than most of the tallest buildings in Boston, Hartford, New Haven, and Providence.  The tower is used as office space for private businesses and for the Manchester city government.

List of tallest buildings in Pennsylvania: This lists the tallest buildings in Pennsylvania, over 120 meters (400 feet), ranked by height.  The tallest building in Pennsylvania is the 58-story Comcast Center located in Philadelphia, which at 975 feet (297 meters) is currently the 20th-tallest building in the United States.  It was topped out on June 18, 2007, to become the tallest building in Philadelphia and the state.  The currently under construction Comcast Technology Center in Philadelphia, which will rise 60 stories and 1121 feet tall, will be the tallest building in Philadelphia and the state of Pennsylvania upon its completion in 2018.  It will also be the 9th tallest building in the United States.  All of the buildings over 120 meters are in Philadelphia and Pittsburgh; 30 are in Philadelphia and 16 are in Pittsburgh.

Brady Sullivan Plaza: Brady Sullivan Plaza, formerly known as the Hampshire Plaza, is a 259 ft , 20-story high-rise located at 1000 Elm Street, Manchester, New Hampshire.  For 20 years, from its completion in 1972 until the completion of the 275 ft One City Hall Plaza at 900 Elm Street in 1992, it was the tallest building in the U.S. state of New Hampshire and in northern New England.  The building is recognizable as a box-shaped structure, with black tinted windows and black architectural features.

List of tallest buildings in Yorkshire: Yorkshire has many tall buildings, the current tallest building is Bridgewater Place in Leeds.  Sheffield, Bradford, Kingston upon Hull and Doncaster also have tall buildings and there are many planned to be built.  York has a low-rise skyline, the tallest building being the Minster.

Bionic Tower: The Bionic Tower (Spanish: Torre Biónica; Chinese: 仿生塔) is a proposed vertical city, an extremely large building designed for human habitation by Spanish architects Eloy Celaya, María Rosa Cervera and Javier Gómez.  It would have a main tower 1228.2 m high, with 300 stories housing approximately 100,000 people.  The Bionic Tower would be exactly 400 meters taller than the current tallest building, Burj Khalifa.  The point of the Bionic Tower is to use Bionics to solve the world's rising population problems in an eco-friendly way, an incredibly difficult feat to accomplish.  When completed, The Bionic Tower will become the tallest building in the world and the tallest building in Shanghai or as the tallest building in Hong Kong.

List of tallest buildings in Christchurch: This list of tallest buildings in Christchurch ranks high-rise buildings in Christchurch, New Zealand by height.  The first high-rise was Manchester Courts, which was the city's tallest building from 1906 until 1967.  Manchester Courts was demolished following the 2010 Canterbury earthquake.  Six more buildings have held the title of tallest building in Christchurch.  The current tallest building is the Pacific Tower, which was finished in 2010 and rises to 86 m .  Most of the high-rises were demolished following the February 2011 Christchurch earthquake.  Of the 50 buildings in the list, 13 are to remain, 2 have their fate yet to be decided, 1 demolition is underway, and 34 have already been demolished.

List of tallest buildings in Europe by year: This list of tallest buildings in Europe by year ranks the tallest buildings in Europe by year according to height.  Only the ten tallest buildings are included for all decades other than those buildings currently tallest in Europe.  The current tallest building in Europe is the Mercury City Tower in Moscow, Russia, which rises 339 m and was completed in 2012.  The 463 m Lakhta Center in Saint Petersburg, Russia, will become Europe's tallest building when completed in 2017.

Petron Megaplaza: The Petron Megaplaza is an office skyscraper located in Makati, Philippines.  It previously held the title as the tallest building in the Philippines from 1998-2000, when the current tallest building, the PBCom Tower, was topped-off.  It currently holds the title as the 5th tallest building in Makati, and the 9th-tallest building in the country and Metro Manila as well.  It has a total ground to architectural spire top height of 210 meters, soaring at 45 storeys high.

Supporting paragraphs: Brady Sullivan Plaza City Hall Plaza (Manchester)
Answer: 259 ft