"Hans Ditlev Franciscus (Frants) von Linstow (4 May 1787 – 10 June 1851) was a Danish-born, Norwegian architect. He was one of the more significant architects ...
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in Norway during his lifetime. He is well known to have designed the Royal Palace in Oslo and much of the surrounding park and the street Karl Johans gate." - (en.wikipedia.org 07.06.2020)