▁the ▁ 1 9 1 8 ▁creation ▁of ▁the ▁Kingdom ▁of ▁Y ug oslav ia , ▁this ▁initial ▁bottom - up ▁enthus ias m ▁began ▁to ▁fade . ▁Y ug oslav ▁architecture ▁became ▁more ▁dict ated ▁by ▁an ▁increasing ly ▁concentr ated ▁state ▁authority ▁which ▁sought ▁to ▁establish ▁a ▁un ified ▁state ▁identity . ▁ ▁In ▁ 1 9 1 9 , ▁Ivan ▁V urn ik ▁and ▁Jo že ▁Ple č nik ▁founded ▁the ▁L jub lj ana ▁School ▁of ▁Architecture . ▁ ▁The ▁ 1 9 2 0 s ▁de cade ▁is ▁associated ▁with ▁the ▁search ▁for ▁a ▁Sloven e ▁" National ▁Style ", ▁inspired ▁by ▁Sloven e ▁folk ▁art ▁and ▁the ▁Vienna ▁Sec ession ▁style . ▁The ▁Cooper ative ▁Business ▁Bank , ▁designed ▁by ▁V urn ik ▁and ▁his ▁wife ▁Hel ena ▁K ott ler ▁V urn ik ▁who ▁designed ▁the ▁decor ative ▁fac ade ▁in ▁the ▁colors ▁of ▁Sloven e ▁tr icol or , ▁has ▁been ▁called ▁the ▁most ▁beautiful ▁building ▁in ▁L jub lj ana . ▁ ▁Begin ning ▁with ▁the ▁late ▁ 1 9 2 0 s ▁and ▁ 1 9 3 0 s , ▁Y ug oslav ▁architect s ▁including ▁V urn ik ▁and ▁Ple č nik ▁began ▁to ▁advoc ate ▁for ▁architect ural ▁modern ism ▁and ▁ ▁functional ist ▁, ▁view ing ▁the ▁style ▁as ▁the ▁logical ▁extension ▁of ▁progress ive ▁national ▁narr atives . ▁▁ ▁Jo že ▁Ple č nik ▁gave ▁L jub lj ana ▁its ▁modern ▁identity ▁by ▁design ing ▁icon ic ▁buildings ▁such