Due to Maria Caterina's illicit position as the Prince of Condé's mistress, the new French queen, 18-year-old Marie Antoinette (wife of King Louis XVI of France), treated her poorly at court, which consequently offended Louis Joseph. In about 1774, Louis Joseph and his mistress Maria began the construction of the Hôtel de Monaco, which was to be her permanent home in Paris. It was in the "rue Saint-Dominique", near the Palais Bourbon, and was completed in 1777. Subsequently, Prince Honoré of Monaco finally realized his relationship with Maria Caterina was completely finished and thereupon turned his attention to his own love affairs. Maria Caterina later wrote to her husband that their marriage could be summarised in three words: greed, bravery, and jealousy.