Jacques Groag (5 February 1892 – 28 January 1962) was an architect and an interior designer, originally from Moravia.
After completing military service, he went to Vienna to study architecture in 1910 with Adolf Loos, a well-known Austrian architect of Moravian origin.
Ludwig Wittgenstein was sent for his military training in Olomouc and Paul Engelmann, native from the town, introduced him to the Groags.
[1] When Margaret Wittgenstein decided to build a home in Vienna, Engelmann was contacted and he brought along in the project Jacques Groag.
He suffered a heart attack on a London bus whilst on his way to the opera, and died on 28 January 1962, aged 69.