Kremlin
Origin

The site had been continuously inhabited by Finnic peoples (especially the Meryans) since the 2nd century BCE. The Slavs occupied the south-western portion of Borovitsky Hill as early as the 11th century, as evidenced by a metropolitan seal from the 1090s which was unearthed by Soviet archaeologists in the area. The Vyatichi built a fortified structure (or "grad") on the hill where the Neglinnaya River flowed into the Moskva River.

Up to the 14th century, the site was known as the "grad of Moscow". The word "Kremlin" was first recorded in 1331 (though etymologist Max Vasmer mentions an earlier appearance in 1320). The grad was greatly extended by Prince Yuri Dolgorukiy in 1156, destroyed by the Mongols in 1237 and rebuilt in oak by Ivan I Kalita in 1339.
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