Nelson Monument, Edinburgh

The City Observatory was an astronomical observatory on Calton Hill in Edinburgh, Scotland. It is also known as the Calton Hill Observatory. The site is enclosed by a boundary wall with a monument to John Playfair, president of the Edinburgh Astronomical Institution, in the southeast corner. The oldest part is the Gothic Tower in the southwest corner, facing Princes Street and Edinburgh Castle. It is also known as Observatory House, the Old Observatory, or after its designer James Craig House. The central building with the appearance of a Greek temple is the Playfair Building, named after the building's designer William Henry Playfair. This houses the 6-inch (15 cm) refractor in its dome and the 6.4-inch (16 cm) transit telescope in its eastern wing. The largest dome of the site is the City Dome in the northeast corner. During the early 20th century this contained a 22-inch (56 cm) refractor. In 2018, the entire site was restored and new buildings were added. The City Observatory site was opened freely to the public for the first time on 24 November 2018 as Collective, a centre for contemporary art.

The Edinburgh Astronomical Institution was founded in 1811 and wound up in 1847. It was instrumental in the foundation of the Royal Observatory, Edinburgh in 1822. The Institution raised funds, mostly by member subscription, to create three departments: A scientific observatory with an observer was to be under the control of the professors of mathematics, philosophy and astronomy of the University of Edinburgh, a popular observatory was to provide general instruction and amusement and a "physical cabinet" would comprise books, globes, meteorological and other instruments.

The National Monument of Scotland, on Calton Hill in Edinburgh, is Scotland's national memorial to the Scottish soldiers and sailors who died fighting in the Napoleonic Wars. It was intended, according to the inscription, to be "A Memorial of the Past and Incentive to the Future Heroism of the Men of Scotland".The monument dominates the top of Calton Hill, just to the east of Princes Street. It was designed during 1823–6 by Charles Robert Cockerell and William Henry Playfair and is modelled upon the Parthenon in Athens. Construction started in 1826 and, due to the lack of funds, was left unfinished in 1829. This circumstance gave rise to various nicknames such as "Scotland's Folly", "Edinburgh's Disgrace", "the Pride and Poverty of Scotland" and "Edinburgh's Folly".

The Dugald Stewart Monument is a memorial to the Scottish philosopher Dugald Stewart (1753–1828). It is situated on Calton Hill overlooking the city of Edinburgh and was designed by Scottish architect William Henry Playfair.

Calton Hill () is a hill in central Edinburgh, Scotland, situated beyond the east end of Princes Street and included in the city's UNESCO World Heritage Site. Views of, and from, the hill are often used in photographs and paintings of the city. Calton Hill is the headquarters of the Scottish Government, which is based at St Andrew's House, on the steep southern slope of the hill. The Scottish Parliament Building and other prominent buildings such as Holyrood Palace lie near the foot of the hill. Calton Hill is also the location of several monuments and buildings: the National Monument, the Nelson Monument, the Dugald Stewart Monument, the old Royal High School, the Robert Burns Monument, the Political Martyrs' Monument and the City Observatory.The area lies between the Edinburgh districts of Greenside and Abbeyhill.

Collective is a contemporary art centre in Edinburgh, Scotland. It is situated on Calton Hill, in the former City Observatory and City Dome site. It offers a programme of exhibitions, guided walking tours, audio walking tours, and events.

The Bridewell was a prison in Edinburgh, Scotland, built by Robert Adam in 1791.The remains of the prison can still be seen built into the bottom part of the Scottish Government building on Regent Road.

St. Andrew's House (SAH), on the southern flank of Calton Hill in central Edinburgh, is the headquarters building of the Scottish Government. The building stands on the site of the former Calton Gaol. Today, the turreted Governor's House is all that remains of the former prison, next to the Old Calton Burial Ground and Political Martyrs' Monument. The large Category A listed Art Deco-influenced building looks out over Waverley Station, the Canongate and Holyrood Park.

The Old Royal High School, also known as New Parliament House, is a 19th-century neoclassical building on Calton Hill in the city of Edinburgh. The building was constructed for the use of the city's Royal High School, and gained its alternative name as a result of a proposal in the 1970s for it to house a devolved Scottish Assembly. After the Royal High School was relocated in 1968, the building became available and was refurbished to accommodate a new devolved legislature for Scotland. However, the 1979 devolution referendum failed to provide sufficient backing for a devolved assembly. Its debating chamber was later used for meetings of the Scottish Grand Committee, the committee of Members of Parliament in the United Kingdom House of Commons with constituencies in Scotland. Subsequently, the building has been used as offices for departments of Edinburgh City Council, including The Duke of Edinburgh's Award unit and the Sports and Outdoor Education unit.With the passage of the Scotland Act 1998 and the introduction of Scottish devolution in 1999, the Old Royal High School was again mooted as a potential home for the new Scottish Parliament. Eventually, however, the Scotland Office decided to site the new legislature in a purpose-built structure in the Holyrood area of the Canongate. Edinburgh's original Parliament House is in the Old Town just off the Royal Mile and currently houses the Court of Session. These were the buildings of the former Parliament of Scotland which existed before the formation of the Kingdom of Great Britain in 1707 and the foundation of a British Parliament sitting at London's Palace of Westminster. A number of uses have been suggested for the building, including a home for a Scottish National Photography Centre. In 2015, The City of Edinburgh Council, which currently owns the building, initiated a project to lease it to be used as a luxury hotel. However, in 2021, it was announced that the lease to the hotel developers had been cancelled, and a new use was being sought.

Caltongate (now known as New Waverley Square) is the largest city centre redevelopment project in Edinburgh since the 18th century. First proposed in 2005, it took 9 years to be given the go-ahead by Edinburgh Council, after disruption caused by the 2007–2008 financial crisis. The name Caltongate combines Canongate and Calton Hill, as the area lies on Canongate, and faces directly onto Calton Hill. Caltongate lies within the Old Town, Edinburgh, which was recognised as a UNESCO World Heritage site in 1994. Construction began in 2014 and is yet to be completed.

The Dunard Centre (officially the Dunard Centre supported by the Royal Bank of Scotland and previously known as the IMPACT Centre) is a planned concert hall to be located in the city centre of Edinburgh, the capital of Scotland. The proposed venue is currently being designed by David Chipperfield Architects, with a variation to the existing planning application scheduled for 2021. The Dunard Centre is being designed to be a world-class venue with the very best in modern acoustics and will be a venue for all kinds of music and performance: from orchestral to jazz and from pop to folk, welcoming chamber groups, soloists, bands, choirs, comedians and dance ensembles. It will be an informal cultural hub with education and community outreach central to its vision. The Dunard Centre will be the home of the Scottish Chamber Orchestra and serve as a principal venue for the Edinburgh International Festival. The Dunard Centre is expected to cost at least £75 million, of which £25 million will be contributed by the local and national governments as one of the investments facilitated by the Edinburgh and South East Scotland City Region Deal, £35 million from Carol Grigor, an American arts benefactor, through the Dunard Fund, and a further £15 million being raised through a fundraising campaign. The fund also agreed to underwrite any cost overruns or capital deficits in the Dunard Centre's first three years of operation.

The Political Martyrs Monument, located in the Old Calton Burial Ground on Calton Hill, Edinburgh, commemorates five political reformists from the late 18th and early 19th centuries. Designed by Thomas Hamilton and erected in 1844, it is a 90 ft (27 m) tall obelisk on a square-plan base plinth, all constructed in ashlar sandstone blocks. As part of the Burial Ground it is Category A listed.