Stock Photo - The grave of famous Danish astronomer Tycho Brahe inside the Tyn Church The Church of Our Lady Before Tyn at the Prague´s Old Town An international team of scientists will examine the tomb in order to find out the real cause of Brahe´s death According to textbooks the astronomer died over problems with renal stones, but certain signs point to poisoning on the order of Danish King Christian IV The Czech and Danish experts from Aarhus University will open Brahe´s tomb on Monday, Nov 15th to extracted samples for laboratory tests According to analysis by Danish toxicologists an unusually big quantity of mercury was found in Brahe´s beard taken out from his tomb in 1901 CTK Photo/Rene Fluger