▁Gal icia – Vol h yn ia . ▁ ▁During ▁this ▁time ▁Polish ▁sett lers ▁helped ▁to ▁econom ically ▁develop ▁the ▁region ▁and ▁they ▁formed ▁a ▁significant ▁element ▁in ▁the ▁courts ▁of ▁the ▁Gal ician ▁r ul ers . ▁ ▁Following ▁the ▁ext inction ▁of ▁the ▁R ur ik id ▁dynast y ▁and ▁the ▁end ▁of ▁the ▁Gal ician - Vol h yn ian ▁kingdom , ▁this ▁region ▁was ▁joined ▁with ▁the ▁Polish ▁Crown ▁at ▁the ▁Polish – L ith uan ian ▁peace ▁treat y ▁signed ▁in ▁ 1 3 6 6 ▁by ▁Cas imir ▁III ▁of ▁Poland , ▁with ▁Li ub art as ▁of ▁Lith u ania . ▁ ▁A ▁Roman ▁Catholic ▁Arch di oc ese ▁was ▁established ▁in ▁the ▁old ▁Gal ician ▁capital ▁of ▁Hal ych ▁in ▁ 1 3 7 5 , ▁and ▁was ▁transferred ▁to ▁L viv ▁in ▁ 1 4 1 2 . ▁Native ▁nobles ▁( boy ars ) ▁who ▁refused ▁to ▁declare ▁alleg iance ▁to ▁the ▁Polish ▁kingdom ▁were ▁dispos s essed ▁of ▁their ▁lands , ▁which ▁were ▁granted ▁to ▁arriv ing ▁nobles ▁from ▁Poland . ▁ ▁Lar ge ▁numbers ▁of ▁sett lers ▁came ▁to ▁Gal ician ▁lands ▁from ▁L esser ▁Poland ; ▁Polish ▁nobles ▁were ▁given ▁land ▁gr ants , ▁Polish ▁pe as ants ▁settled ▁in ▁the ▁coun tr ys ide ▁and ▁Polish , ▁German ▁and ▁Armen ian ▁mer ch ants ▁and ▁craft s men ▁settled ▁in ▁the ▁towns . ▁ ▁Over ▁time , ▁many ▁but ▁not ▁all ▁of ▁the ▁remaining ▁native ▁nob ility ▁( part