▁landscape , ▁numerous ▁historic ▁buildings , ▁and ▁a ▁year - round ▁m ild ▁Mediter rane an ▁climate . ▁ ▁Geography ▁The ▁Aust rian ▁coast ▁ran ▁from ▁the ▁border ▁with ▁the ▁Kingdom ▁of ▁Italy ▁( V en eto ) ▁on ▁the ▁G ulf ▁of ▁Tri este ▁down ▁to ▁Pol a ▁( P ula ) ▁on ▁the ▁southern ▁tip ▁of ▁the ▁Ist rian ▁pen ins ula ▁and ▁to ▁O pat ija ▁on ▁the ▁K var ner ▁G ulf . ▁The ▁Ist rian ▁coast ▁up ▁to ▁Tri este ▁is ▁now ▁part ▁of ▁the ▁Italian ▁municipality ▁of ▁M ugg ia ▁( ), ▁the ▁Coast al - Kar st ▁of ▁Sloven ia , ▁and ▁the ▁County ▁of ▁Ist ria ▁in ▁Cro atia . ▁The ▁coast ▁north ▁of ▁Tri este ▁is ▁partially ▁rock y , ▁and ▁partially ▁sand y , ▁with ▁the ▁Lag una ▁di ▁Gr ado ; ▁it ▁is ▁now ▁part ▁of ▁the ▁autonom ous ▁Fri uli - V enez ia ▁Giul ia ▁region ▁of ▁Italy . ▁ ▁History ▁▁ ▁In ▁An cient ▁Roman ▁times ▁the ▁region ▁was ▁the ▁site ▁of ▁important ▁settlement s ▁like ▁Aqu ile ia . ▁From ▁the ▁Late ▁Middle ▁A ges ▁until ▁the ▁ 1 7 9 7 ▁Tre aty ▁of ▁Cam po ▁Form io , ▁most ▁of ▁the ▁area ▁was ▁administr ated ▁by ▁the ▁Republic ▁of ▁Ven ice , ▁while ▁in ▁ 1 3 8 2 , ▁Tri este ▁was ▁joined ▁with ▁the ▁H abs burg ▁Mon archy ▁which ▁also ▁controlled ▁most ▁of ▁the ▁hinter land . ▁Tri este ▁developed ▁into ▁an ▁important