Monte Carlo Casino is a gambling and entertainment complex located in Monaco. It includes a casino, the Grand Théâtre de Monte Carlo, and the office of Les Ballets de Monte Carlo.
The idea of opening a gambling casino in Monaco belongs to Princess Caroline (1793-1879), a shrewd, business-minded spouse of Prince Florestan I. Revenues from the proposed venture were supposed to save the House of Grimaldi from bankruptcy. Construction at this site began in 1858 to designs of the Parisian architect Gobineau de la Bretonnerie and was completed in 1863. Gobineau de la Bretonnerie also designed the neighboring Hôtel de Paris (constructed in 1862).
In 1878–79, the casino building was transformed and expanded to designs of Jules Dutrou (1819–1885) and Charles Garnier, the architect who had designed the Paris opera house now known as the Palais Garnier.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.