The Fort In 1536, Don
Pedro de Mendoza established a settlement near the mouth of the
Riachuelo de los Navíos, called
Nuestra Señora del Buen Ayre. In 1580,
Juan de Garay founded the city at the place which was to be the Plaza Mayor (nowadays
Plaza de Mayo), naming it Santísima Trinidad while the port retained the name of the original settlement; the "Royal Fort of Don Juan Baltasar de Austria" was built in 1594. It was replaced in 1713 by a more solid construction with turrets, sentry boxes, a moat and a drawbridge that upon being completed in 1720 was given the name of "Castillo San Miguel" (St. Michael's Castle). President
Bernardino Rivadavia modified the fort in 1820, and the drawbridge was replaced by a neoclassical portico. The site, which was for defence at that time, and also the seat of the Spanish and Home governments, is where Government House currently stands. In the Pink House Museum there is a cannon-ball hole in part of a storage room of the Royal Treasury's warehouse.
New Customs House Under the direction of the
English architect Edward Taylor, the New Customs House was built in 1855 back-to-back with the rear walls of the Fort, facing the river. It is the first public building of great size built by the young mercantile
State of Buenos Aires; its semicircular shape had five floors for depots and fifty-one storage rooms with arched ceilings, surrounded by
loggias. From the central tower, which had a clock and a beacon at its top, stretched out a 300 m pier where ships of greater draught could anchor. Goods carts could access the dock via two side ramps carts. It was used for almost forty years, then demolished down to the first floor by the
Madero Port project; its foundations are buried under what is today
Colón Park.
The Post Office Palace President
Domingo Sarmiento ordered the construction of the Postal headquarters in 1873 on open ground that had remained after the south wing of the
Buenos Aires Fort had been demolished. This project was carried out by the Swedish architect
Carlos Kihlberg (Swedish:Carl August Kihlberg), with a design inspired by
Italian Renaissance Revival architecture and
French Second Empire details. As Government House looked totally insignificant compared to this new post office building, President
Julio Roca called upon the department of civil engineers to produce a project for extending and repairing the former, and the project submitted by the Swedish architect Enrique Aberg (Swedish:
Henrik Åberg) was adopted. It proposed the demolition of the Fort and the construction of another building, identical to the post office, differentiating it by incorporating a long balcony on the first floor for the use of authorities during public festivities and parades. This was the end of the Fort, of which only some walls and one of the cannon-ball holes can be seen in the current Government House museum. For aesthetic reasons and to solve the problem of lack of space it was later decided that the Post Office building would be incorporated into Government House. Architect
Francesco Tamburini was commended this task. He designed a great central archway to join the two buildings into one, enveloping a central main axis on which the entrances were located, emphasized by a higher archway.
The Palace The buildings have three storeys on Balcarce Street and four storeys plus a basement/galleries of Government House Museum, on Avenida Paseo Colón, practically extending over a whole city block. All the original rooms that are on the three main
façades have direct ventilation and lighting, while the original internal rooms were designed for ventilation and light to come from the loggias surrounding internal patios built for this purpose. All, except one were crowned by
skylights, of which only two remain. The original structure consists of packwalls of varying thickness and slabs supported by brick counter ceilings with steel or wood roof lines, according to the sector. Following a long process of construction the current building was officially inaugurated in 1898, during the second presidency of General Julio Roca. ==Rooms==