This former female Benedictine convent situated right next to the Basilica of St. George was founded in 973, by a Premyslid duke, Boleslaus II. The building now houses collections of the National Gallery, currently displaying Bohemian art of the 19th century.
Wikipedia https://en.wikipedia.org/wiki/St._George's_Convent,_Prague
Address U Svatého Jiří, Prague 11900, Czech Republic
Coordinates 50°5'29.511" N 14°24'8.725" E