Sketch of a Window and Arches of the Nave in the Church of St. Wensceslas in Prague by Sir Robert Smirke the younger https://www.rawpixel.com/image/9494542/image-art-watercolors-vintageFree Image from public domain licensePowder Tower, One of the Original City Gates into the City of Prague by Sir Robert Smirke the younger https://www.rawpixel.com/image/9491914/image-art-watercolor-vintageFree Image from public domain license