The Boer Republics of the ZAR and the Orange Free State were united with the Cape Colony and Natal Colony in 1910 to become the Union of South Africa.
Pretoria then became the administrative capital of the whole of South Africa, with Cape Town the legislative capital.
Between 1860 and 1994, the city was also the capital of the province of Transvaal, superseding Potchefstroom in that role.
The new Union required a governmental building which could signify unity and host the new government.

Marthinus Wessel Pretorius, later to become first president of the Transvaal Republic, was the original owner of the farm 'Elandsfontein' on which Meintjieskop stands.
In 1856 Andries Francois du Toit (1813–1883), in exchange for a Basotho pony, acquired part of the farm, which he named 'Arcadia' and on which the Union Buildings were later constructed.
He was also Pretoria's first magistrate and was responsible for the layout of the city.
During this period he sold his land to Stephanus Jacobus Meintjies (1819–1887), after whom the hill is named.

In 1909 Herbert Baker was commissioned to design the Government Building of the Union of South Africa (which was formed on 31 May 1910) in Pretoria.
Pretoria was to become the administrative centre for the new government.
In November 1910 the cornerstone of the Union Building was laid.

Lord Selborne and H.C. Hull, a member of the first Union Cabinet, chose Meintjieskop as the site for Baker's design.
The site was that of a disused quarry and the existing excavations were used to create the amphitheatre, which was set about with ornamental pools, fountains, sculptures, balustrades and trees.

The design consisted of two identical wings, joined by a semicircular colonnade forming the backdrop of the amphitheatre.
The colonnade was terminated on either side by a tower.
Each wing had a basement and three floors above ground.
The interiors were created in the Cape Dutch style with carved teak fanlights, heavy doors, dark ceiling beams contrasting with white plaster walls and heavy wood furniture.
Baker used indigenous materials as far as possible.
The granite was quarried on site while Buiskop sandstone was used for the courtyards.
Stinkwood and Rhodesian teak were used for timber and wood panelling.
The roof tiles and quarry tiles for the floors were made in Vereeniging.

The cornerstone was laid in November 1910, shortly after the Union of South Africa – for which the buildings are named – was formed.
Taking 1,265 workers over three years to build, the structure was completed in 1913 at a total cost of £1,310,640 for the building and £350,000 for the site.

Designed by Sir Herbert Baker in 1908, building began in 1909 and was completed in 1913.
It took approximately 1265 artisans, workmen and labourers almost three years to construct, using 14 million bricks for the interior office walls, half a million cubic feet of freestone, 74 000 cubic yards of concrete, 40 000 bags of cement and 20 000 cubic feet of granite.

Originally built to house the entire Public Service for the Union of South Africa, it was then the largest building in the country and possibly the largest building work undertaken in the Southern Hemisphere at that time.

Several other sites were considered, including Muckleneuk Ridge, on the opposite side of the city, and Pretorius Square, in the centre of Pretoria, where the City Hall now stands.
However, Herbert Baker was strongly in favour of Meintjieskop, which was within a mile of the centre of Pretoria and reminded him strongly of some of the acropolises of Greece and Asia Minor, where he had studied Mediterranean architecture.

The concept of an acropolis and a building that agreed with renowned British Architect Sir Christopher Wren's theory that a public building should be a national ornament which establishes a nation, draws people and commerce and makes people love their country easily persuaded the then powers that be, who were at the time, preoccupied with the ideal of establishing a new and united nation.

The British high commissioner at the time, Lord Selborne, remarked;
Peop
The Boer Republics of the ZAR and the Orange Free State were united with the Cape Colony and Natal Colony in 1910 to become the Union of South Africa. Pretoria then became the administrative capital of the whole of South Africa, with Cape Town the legislative capital. Between 1860 and 1994, the city was also the capital of the province of Transvaal, superseding Potchefstroom in that role. The new Union required a governmental building which could signify unity and host the new government.
Marthinus Wessel Pretorius, later to become first president of the Transvaal Republic, was the original owner of the farm 'Elandsfontein' on which Meintjieskop stands. In 1856 Andries Francois du Toit (1813–1883), in exchange for a Basotho pony, acquired part of the farm, which he named 'Arcadia' and on which the Union Buildings were later constructed. He was also Pretoria's first magistrate and was responsible for the layout of the city. During this period he sold his land to Stephanus Jacobus Meintjies (1819–1887), after whom the hill is named.
In 1909 Herbert Baker was commissioned to design the Government Building of the Union of South Africa (which was formed on 31 May 1910) in Pretoria. Pretoria was to become the administrative centre for the new government. In November 1910 the cornerstone of the Union Building was laid.
Lord Selborne and H.C. Hull, a member of the first Union Cabinet, chose Meintjieskop as the site for Baker's design. The site was that of a disused quarry and the existing excavations were used to create the amphitheatre, which was set about with ornamental pools, fountains, sculptures, balustrades and trees.
The design consisted of two identical wings, joined by a semicircular colonnade forming the backdrop of the amphitheatre. The colonnade was terminated on either side by a tower. Each wing had a basement and three floors above ground. The interiors were created in the Cape Dutch style with carved teak fanlights, heavy doors, dark ceiling beams contrasting with white plaster walls and heavy wood furniture. Baker used indigenous materials as far as possible. The granite was quarried on site while Buiskop sandstone was used for the courtyards. Stinkwood and Rhodesian teak were used for timber and wood panelling. The roof tiles and quarry tiles for the floors were made in Vereeniging.
The cornerstone was laid in November 1910, shortly after the Union of South Africa – for which the buildings are named – was formed. Taking 1,265 workers over three years to build, the structure was completed in 1913 at a total cost of £1,310,640 for the building and £350,000 for the site.
Designed by Sir Herbert Baker in 1908, building began in 1909 and was completed in 1913. It took approximately 1265 artisans, workmen and labourers almost three years to construct, using 14 million bricks for the interior office walls, half a million cubic feet of freestone, 74 000 cubic yards of concrete, 40 000 bags of cement and 20 000 cubic feet of granite.
Originally built to house the entire Public Service for the Union of South Africa, it was then the largest building in the country and possibly the largest building work undertaken in the Southern Hemisphere at that time.
Several other sites were considered, including Muckleneuk Ridge, on the opposite side of the city, and Pretorius Square, in the centre of Pretoria, where the City Hall now stands. However, Herbert Baker was strongly in favour of Meintjieskop, which was within a mile of the centre of Pretoria and reminded him strongly of some of the acropolises of Greece and Asia Minor, where he had studied Mediterranean architecture.
The concept of an acropolis and a building that agreed with renowned British Architect Sir Christopher Wren's theory that a public building should be a national ornament which establishes a nation, draws people and commerce and makes people love their country easily persuaded the then powers that be, who were at the time, preoccupied with the ideal of establishing a new and united nation.
The British high commissioner at the time, Lord Selborne, remarked;
Peop
Union Buildings