period from 1795 to 1814 the population of Odessa increased 15 times over and reached almost 20 thousand people. The first city plan was designed by the engineer F. Devollan in the late 18th century. Colonists of various ethnicities settled mainly in the area of the former colony, outside of the official boundaries, and as a consequence, in the first third of the 19th century, Moldavanka emerged as the dominant settlement. After planning by the official architects who designed buildings in Odessa's central district, such as the Italians Franz Karlowicz Boffo and Giovanni Torricelli, Moldovanka was included in the general city plan, though the original grid-like plan of Moldovankan streets, lanes and squares remained unchanged.
The new city quickly became a major success. Its early growth owed much to the work of the Duc de Richelieu, who served as the city's governor between 1803 and 1814. Having fled the French Revolution, he had served in Catherine's army against the Turks. He is credited with designing the city and organizing its amenities and infrastructure, and is considered one of the founding fathers of Odessa, together with another Frenchman, Count Andrault de Langeron, who succeeded him in office. Richelieu is commemorated by a bronze statue, unveiled in 1828 to a design by Ivan Martos. His contributions to the city are mentioned by Mark Twain in his travelogue Innocents Abroad: "I mention this statue and this stairway because they have their story. Richelieu founded Odessa - watched over it with paternal care - labored with a fertile brain and a wise understanding for its best interests - spent his fortune freely to the same end - endowed it with a sound prosperity, and one which will yet make it one of the great cities of the Old World".
In 1819 the city became a free port, a status it retained until 1859. It became home to an extremely diverse population of Albanians, Armenians, Azeris, Bulgarians, Crimean Tatars, Frenchmen, Germans
