They are located on either side of a main courtyard, surrounded to the south by a two-hectare French garden, and to the north by a parade ground.

[3] In 1732, the Compagnie perpétuelle des Indes decided to transfer the headquarters of all its sales from Nantes to Lorient, thus requiring the construction of new facilities to accommodate buyers.

In May, a more sober project on the banks of the Scorff was selected, and Gabriel came to Lorient in July to sign the adjudication and mark out potable water points for future construction.

[4] The foundation stone was laid on September 1, 1733, but the slow pace of construction forced the architect to reduce the size of the building to keep it on schedule, as sales were due to start in autumn 1734.

[5] From 1739 onwards, the business activities of the Compagnie perpétuelle des Indes were expanding, and the increase in sales led not only to a rise in the company's resources, but also to the need for larger facilities, as the first auction houses built were proving too small.

An earlier project was revived, located near the entrance to the harbor enclosure, and featuring a structure "formed of three vaults", inspired by the spaces of the Grand Trianon.

[17] It is crossed in a north–south line by an axis providing perspective to the ensemble, and is composed of parterres in geometric shapes arranged around a circular water surface in the center of the garden.

[8] The monumental ensemble comprises two symmetrical pavilions built in a classical style, each extended to the south by two lateral wings, and composed of granite ashlar on the lower section and limestone on the upper.

On the Place d'Armes side, to the north of the buildings, there are five bays whose upper sections are aligned at three heights; the central window is the highest, and the dormers at the ends are the lowest.

She is shown with many of her traditional attributes: warrior (helmet, armor, spear), naval (compass, square, spyglass), as well as an owl and a flute with sheet music.