Main Gate Of The Wall Of The Tomb Of King Tu Duc I - All Speakers Have Gates Built On The Same Chinese Model. There Are Always Three Entries, The Center Is Reserved For The Emperor. This Period Saw The Emergence Of Concrete. The Royal Architects Not Trusting In The Manufacture Of Concrete Pillars, They Have Remained Traditionally Made Of Wood. Is The Reason For The Collapse Of Some Of These Doors. Photo