<P> Another derivation of the name Praha is suggested from na prazě, the original term for the shale hillside rock upon which the original castle was built . At that time, the castle was surrounded by forests, covering the nine hills of the future city--the Old Town on the opposite side of the river, as well as the Lesser Town beneath the existing castle, appeared only later . </P> <P> The English spelling of the city's name is borrowed from French . Prague is also called the "City of a Hundred Spires", based on a count by 19th century mathematician Bernard Bolzano, today's count is estimated by Prague Information Service at 500 . Nicknames for Prague have also included: the Golden City, the Mother of Cities and the Heart of Europe . </P> <P> Prague is situated on the Vltava river, at 50 ° 05 "N and 14 ° 27" E. in the centre of the Bohemian Basin . Prague is approximately at the same latitude as Frankfurt, Germany; Paris, France; and Vancouver, Canada . </P> <P> According to the 2011 census, about 14% of the city inhabitants were foreigners, the highest proportion in the country . </P>

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