This small square is popular among tourists for its views of the Vltava river. It is lined with a number of historical buildings, with the most splendid being a beautiful Baroque Church of St Francis. The center of the square is adorned with a bronze statue of Charles IV, designed by Jan Bendl.
Wikipedia (Czech) https://cs.wikipedia.org/wiki/K%C5%99i%C5%BEovnick%C3%A9_n%C3%A1m%C4%9Bst%C3%AD
More information http://www.prague-guide.co.uk/knights-of-the-cross-square/
Address Křižovnické náměstí, 110 00 Prague 1, Czech Republic
Coordinates 50°5'10.272" N 14°24'51.081" E