After the restoration of the monarchy, Carême cooked for various foreign dignitaries in Paris while working on his two books on pastry. From the fall of 1816 to mid-1817, he served as "chef de cuisine" to the Prince Regent, later George IV, in London. At the Congress of Aix-la-Chapelle in 1818, he was employed by Tsar Alexander I. He later served Lord Stewart, the British ambassador, in Vienna. He accompanied Stewart back to London, but then returned to Paris. In 1819, Carême accepted a position with Tsar Alexander in St. Petersburg, but stayed so briefly that he prepared not even a single meal for the Tsar. He then worked for Princess Catherine Bagration, then for Lord Stewart again in Vienna, and then returned to Paris where he expected to work for Prince Esterházy, but the Prince never arrived in Paris.