Guiliano Mauri is an Italian artist who is professional at building a Cathedral Plant (Tree Cathedral). The cathedral is built in such a real living trees life. These wonderful Tree Cathedral are formed by 1, 800 fir poles with 6,000 meters of hazel branches and 600 chestnut branches made them together by nails, wood, string in order to support house 80 hornbeam saplings. Guiliano Mauri started creating these two spectacular cathedral plants which is the first one was built in Valsugana of Italy since 2002 and the second one in Bergamo that is completely finished in 2010. By 2009 is the year of artist Guiliano Mauri’s death.