linguistic:translation
Russian conquest of Sanjak of Özi (Ochakiv Oblast)

A series of wars between the Russian Empire and the Ottoman Empire, as well as the demise of the Polish-Lithuanian Commonwealth, allowed Russia to start to fully exploit the ancient Black Sea trade across the coastal area through the steppe across southern and eastern Ukraine, into the hinterland of East Central Europe. Stable commercial activity in this region in practice in the past required both security through the overland routes, and knowledge of where products could go overseas. In antiquity, various Greek colonies had taken this role, followed by the Varangians who established Kievan Rus' in the 9th century, as well as various Italian colonies after the Mongol invasion of Europe. Under Catherine the Great, Russia gained, via the Treaty of Küçük Kaynarca, the lands where Mariupol, Kherson, and Mykolaiv would be founded. However, they were all handicapped in various ways relative to how much commercial interest there was. For example, the latter two cities were situated in lowlands near marshes, which provided for poor sanitary conditions in the technology available at that time.

The sleepy fishing village of Odesa had witnessed a sea-change in its fortunes when the wealthy magnate and future Voivode of Kiev (1791), Antoni Protazy Potocki, established trade routes through the port for the Polish Black Sea Trading Company and set up the infrastructure in the 1780s.

During the Russian-Turkish War of 1787–1792, on 25 September 1789, a detachment of Russian forces, including Zaporozhian Cossacks under Alexander Suvorov and Ivan Gudovich, took Khadjibey and Yeni Dünya for the Russian Empire. One section of the troops came under command of a Spaniard in Russian service, Irishman Major General José de Ribas (known in Russia as Osip Mikhailovich Deribas); today, the main street in Odesa, Deribasivska Street, is named after him.

Russia formally gained possession of the Sanjak of Özi (Ochakiv Oblast) as a result of the Treaty of Jassy (Iaşi) in 1792 and it became a part of Yekaterinoslav Viceroyalty. The Russian Empire took full control of Crimea, as well as land between the Southern Bug and the Dniester, including the Khadzhibey Estuary where the Turkish fortress of Khadjibey was located. The newly acquired Ochakov Oblast was promised to the Cossacks by the Russian government for resettlement. On permission of the Archbishop of Yekaterinoslav Amvrosiy, the Black Sea Kosh Host, that was located around the area between Bender and Ochakiv, built second after Sucleia wooden church of Saint Nicholas.

By the Highest rescript of 17 June 1792 addressed to General Kakhovsky it was ordered to establish the Dniester Border Line of fortresses. The commander of the land forces in Ochakiv Oblast was appointed Graf (Count) Suvorov-Rymnikskiy. The main fortress was built near Sucleia at the mouth of river Botna as the Head Dniester Fortress by Engineer-Major de Wollant. Near the new fortress saw the formation of a new "Vorstadt" (suburb) where people moved from Sucleia and Parkan. With the establishment of the Voznesensk Governorate on 27 January 1795, the Vorstadt was named Tiraspol.

The Flemish engineer working for the Russian Empress Catherine the Great, José de Ribas's collaborator Franz de Voland recommended the area of Khadjibey fortress as the site for the region's basic port: it had an ice-free harbor, breakwaters could be cheaply constructed that would render the harbor safe and it would have the capacity to accommodate large fleets. The Namestnik of Yekaterinoslav and Voznesensk, Platon Zubov (one of Catherine's favorites), supported this proposal. In 1794 Catherine issued a Rescript to José de Ribas: "Considering favorable Khadjibey location... I order to establish here a navy harbor and trading pierce..." and invested the first money (26.000 rubles) in construction. Franz de Voland drew up a plan that would end up being the city's plan.

However, adjacent to the new official locality, a Moldavian colony already existed, which by the end of the 18th century was an independent settlement named Moldavanka. Some local historians consider that the settlement predates Odesa by about thirty years and assert that the locality was founded by Moldavians who came to build the fortress of Yeni Dunia for the Ottomans and eventually settled in the area in the late 1760s, right next to the settlement of Khadjibey, on what later became the Primorsky Boulevard. Another version posits that the settlement appeared after Odesa itself was founded, as a settlement of Moldavians, Greeks, and Albanians fleeing the Ottoman yoke.

Under Paul I of Russia, construction of Odesa was stopped, Franz de Voland was removed from the project, and José de Ribas was implicated in a plot to assassinate the Emperor. After Paul's assassination in 1801, the city resumed construction, and used a plan largely from de Voland's work. It was thus one of the few master planned cities in the Russian Empire.