Pregolskiy
Coordinates: 54°41′36″N 20°23′42″E / 54.69333°N 20.39500°E
Pregolsky (Russian: Прегольский) is a residential area within Tsentralny City District of Kaliningrad, Kaliningrad Oblast, Russia.
Prior to World War II, it was known by its German language name Holstein (archaic Hollstein) as first a suburban estate and then a quarter of Königsberg, Germany, located west of the city center.
Located 7 kilometers (4.3 mi) from medieval Königsberg on the northern shore of the Pregel near where the river flowed into the Vistula Lagoon, the Old Prussian village of Kasewalx was first documented in 1405. Other early names included Kasewolx, Kasewalk, and Kesewalk. The name was of Old Prussian origin and referred to a brook or stream.
In 1508, ten farmers lived in the village, then known as Kasebalk and Kasebalg. Johann Schimmelpfennig (1604-1669), a Königsberg Councillor and vice-mayor of Kneiphof, possessed the village and surrounding region in 1650. His widow later sold the land to Elector Frederick III. East of the village was the inn Langerfeldkrug.
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