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In page Sosnowiec:

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The history of the city begins in 1902 when it was granted city rights after the merger a number of older settlements. However, the history of the village of Sosnowiec dates back to the year 1227, when it was mentioned for the first time. It was a small settlement in the Polish Duchy of Kraków, located in close vicinity of much larger and better-developed villages of Sielce and Zagórze (both are now districts of the city). Other districts are even older. Milowice was first mentioned in 1123 as Miley. Documents from 1228 already mention Milowice, Klimontów, and Zagórze. Furthermore, Milowice was placed on a 1561 map.[citation needed]