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Peter the Great (1682–1725)

Peter I (r. 1682–1725), also known as Peter the Great, played a major role in introducing the European state system into Russia. While the empire's vast lands had a population of 14 million, grain yields trailed behind those in the West. Nearly the entire population was devoted to agriculture, with only a small percentage living in towns. The class of kholops, whose status was close to that of slaves, remained a major institution in Russia until 1723, when Peter converted household kholops into house serfs, thus counting them for poll taxation. Russian agricultural kholops had been formally converted into serfs earlier in 1679. They were largely tied to the land, in a feudal sense, until the late 19th century.

Peter's first military efforts were directed against the Ottoman Empire. His attention then turned to the north. Russia lacked a secure northern seaport, except at Arkhangelsk on the White Sea, where the harbor was frozen for nine months a year. Access to the Baltic Sea was blocked by Sweden, whose territory enclosed it on three sides. Peter's ambitions for a "window to the sea" led him, in 1699, to make a secret alliance with Saxony, the Polish–Lithuanian Commonwealth, and Denmark-Norway against Sweden; they conducted the Great Northern War, which ended in 1721 when an exhausted Sweden asked for peace with Russia.

As a result, Peter acquired four provinces situated south and east of the Gulf of Finland, securing access to the sea. There he built Russia's new capital, Saint Petersburg, on the Neva river, to replace Moscow, which had long been Russia's cultural center. This relocation expressed his intent to adopt European elements for his empire. Many of the government and other major buildings were designed under Italianate influence. In 1722, he turned his aspirations toward increasing Russian influence in the Caucasus and the Caspian Sea at the expense of the weakened Safavid Persians. He made Astrakhan the centre of military efforts against Persia, and waged the first full-scale war against them in 1722–23. Peter the Great temporarily annexed several areas of Iran to Russia, which after the death of Peter were returned in the 1732 Treaty of Resht and 1735 Treaty of Ganja as a deal to oppose the Ottomans.

Peter reorganized his government based on the latest political models of the time, molding Russia into an absolutist state. He replaced the old Boyar Duma (council of nobles) with a nine-member Senate, in effect a supreme council of state. The countryside was divided into new provinces and districts. Peter told the Senate that its mission was to collect taxes, and tax revenues tripled over the course of his reign. Meanwhile, all vestiges of local self-government were removed. Peter continued and intensified his predecessors' requirement of state service from all nobles, in the Table of Ranks.

As part of Peter's reorganisation, he also enacted a church reform. The Russian Orthodox Church was partially incorporated into the country's administrative structure, in effect making it a tool of the state. Peter abolished the patriarchate and replaced it with a collective body, the Most Holy Synod, which was led by a government official.

Peter died in 1725, leaving an unsettled succession. After a short reign by his widow, Catherine I, the crown passed to Empress Anna. She slowed the reforms and led a successful war against the Ottoman Empire. This resulted in a significant weakening of the Crimean Khanate, an Ottoman vassal and long-term Russian adversary.

The discontent over the dominant positions of Baltic Germans in Russian politics resulted in Peter I's daughter Elizabeth being put on the Russian throne. Elizabeth supported the arts, architecture, and the sciences (for example, the founding of Moscow University). But she did not carry out significant structural reforms. Her reign, which lasted nearly 20 years, is also known for Russia's involvement in the Seven Years' War, where it was successful militarily, but gained little politically.