▁the ▁ 2 0 th ▁century , ▁the ▁national ▁and ▁universal ▁style ▁were ▁merged ▁by ▁the ▁architect s ▁Ed vard ▁Rav nik ar ▁and ▁Mark o ▁Mu š ič . ▁ ▁Pre history ▁and ▁Anti qu ity ▁ ▁Ar ound ▁ 2 0 0 0 ▁BC , ▁the ▁L jub lj ana ▁Marsh es ▁in ▁the ▁immediate ▁vic inity ▁of ▁L jub lj ana ▁were ▁settled ▁by ▁people ▁living ▁in ▁p ile ▁dwell ings . ▁Pre histor ic ▁p ile ▁dwell ings ▁and ▁the ▁oldest ▁wooden ▁wheel ▁in ▁the ▁world ▁are ▁among ▁the ▁most ▁notable ▁ar che ological ▁find ings ▁from ▁the ▁mar sh land . ▁These ▁lake - d well ing ▁people ▁lived ▁through ▁hunting , ▁fish ing ▁and ▁primitive ▁agricult ure . ▁To ▁get ▁around ▁the ▁mar sh es , ▁they ▁used ▁d ug out ▁can o es ▁made ▁by ▁cutting ▁out ▁the ▁inside ▁of ▁tree ▁tr unks . ▁Their ▁arch ae ological ▁remains , ▁now ad ays ▁in ▁the ▁Municip ality ▁of ▁Ig , ▁have ▁been ▁designated ▁a ▁UN ES CO ▁World ▁Heritage ▁Site ▁since ▁June ▁ 2 0 1 1 , ▁in ▁the ▁common ▁nom ination ▁of ▁six ▁Al pine ▁states . ▁ ▁Ar ound ▁ 5 0 ▁BC , ▁the ▁Rom ans ▁built ▁a ▁military ▁enc amp ment ▁that ▁later ▁became ▁a ▁permanent ▁settlement ▁called ▁I ul ia ▁A em ona . ▁This ▁ent rench ed ▁fort ▁was ▁occupied ▁by ▁the ▁Leg io ▁XV ▁Apol lin aris . ▁In ▁ 4 5 2 , ▁it ▁was ▁destroyed ▁by