The Duchy of Württemberg was ruled by a regency council until 1744,[citation needed] when Charles Eugene reached the age of majority at 16.

[3] Charles Eugene turned his attention back to Stuttgart and, in 1763, he hired of architects led by Philippe de La Guêpière to plan a new palace that received the name "Solitude".

[8] He was succeeded as court architect and as director of construction at Solitude by his student, Reinhard Heinrich Ferdinand Fischer.

[11] Solitude was abandoned in the 20th century, the gardens fell into disrepair, and the ceiling frescoes by Nicolas Guibal were largely destroyed by water damage.

Sonderborg from the Stuttgart Art Academy, the conductor Manfred Schreier and the actress Bettina Kupfer were frequent guests.

[citation needed] Solitude Palace's complex is made up by a primary palatial structure, two outbuildings, and some avenues.

Reinhard Heinrich Ferdinand Fischer drew up plans for massive expansions to the garden and palace complex from 1766 to 1772 that closely followed the principles of French horticulturalist Antoine-Joseph Dezallier d'Argenville.

The south garden was used for the entertainment of residents and visitors to Solitude and offered a hedge maze, theater, orangery, riding hall, a chinoiserie house,[5] and zoos.

[3] Castle Solitude was designed by a working group at the ducal court led Philippe de La Guêpière, though Charles Eugene was actively involved in the planning.

The center of the building is the White Hall,[6] whose walls are clad in stucco marble and passed through via six French doors, flanked by Corinthian columns.

The stucco work, by Valentin Sonnenschein [de], Johann Adam Bauer, and Ludovico Bossi,[16] is made up by oval-shaped windows connected by flowery garlands and topped by trophies of arms and frescoes.

Above the north and south entrances into the White Hall are, respectively, the coat of arms of the Duchy of Württemberg and those of Duke Charles Eugene.

Peace overcomes War, Bacchus and Ceres hold grapevines to symbolize local viticulture, and Apollo, leading various forms of art personified, celebrates Württemberg's cultural achievements.

[17] On top of the cupola is a viewing platform accessed by a hidden staircase in the north end of the White Hall.

[22] The "basement" of the main building is divided exactly in half by and entered through an oval chamber directly beneath the White Hall.