Duties through the back door diplom work was design Slovinian national theatre in Ljubljan. Ljubljan is main city Slovene. It takes plain 275 km and has 271 881 inhabinants.Throw the city flows river Ljubljanica, which making had not had great filling of the city. Determine grounds for proposal theatre is situated into the blok near the congress square. That is joined whit his upper part on main ljubljans road Slovenska way. Congress place is one of the most important squars in the city. At the first time I desing on well settle theatre on appoint grounds. The buildings at the gas site have windows and that was for me one of the stoping factors. I was worked whit two main ideas. First thought led me to compar the theatre to Congress squar , so that theatre was not drowned within gap site, but I want to show some part of theatre in Congress square. Second thought relates with making some small square before the enter to theatre. And these both ideas leads to my finaly building. The national theatre is compair of three parts. The first part is in the middle and it leads to the square. In this part you can finde a technics rooms a some office. The secound part is intended for public people. In this part is situated theatre front for 502 people. In third floor is situated the gallery. In the fourth floor is the smoll alternative theatre front for about 100 people. In the third part of theatre is situated stage, dressing rooms for actors, day rooms and some storge areas.