▁In ▁ 1 1 5 2 ▁a ▁pap al ▁b ull ▁by ▁Pope ▁Eug ene ▁III ▁recognized ▁the ▁bishop ▁of ▁Tre vis o ▁as ▁lord ▁of ▁M estre ▁and ▁mentioned ▁the ▁existence ▁of ▁the ▁church ▁of ▁St . ▁Lawrence , ▁a ▁castle ▁( Cast el vec chio , ▁Old ▁Castle ) ▁and ▁a ▁port . ▁In ▁ 1 2 5 7 ▁the ▁bishop ▁granted ▁M estre ▁to ▁Al ber ico ▁da ▁Rom ano , ▁the ▁pod est à ▁of ▁Tre vis o . ▁In ▁ 1 2 7 4 ▁a ▁fire ▁destroyed ▁the ▁castle , ▁and ▁M estre ' s ▁inhabitants ▁fort ified ▁the ▁town ▁with ▁a ▁pal is ade , ▁which ▁became ▁Cast el nu ovo ▁( New castle ). ▁No ▁traces ▁of ▁this ▁castle ▁remain ▁today . ▁ ▁In ▁ 1 3 2 3 ▁the ▁S cal iger i ▁family ▁from ▁Ver ona ▁conquer ed ▁Tre vis o ▁and ▁thus ▁acquired ▁M estre . ▁The ▁Ven et ians , ▁fear ing ▁the ▁excess ive ▁Ver ona ' s ▁power ▁in ▁the ▁main land , ▁conquer ed ▁M estre ▁on ▁September ▁ 2 9 , ▁ 1 3 3 7 . ▁ ▁They ▁replaced ▁the ▁old ▁fort ification ▁with ▁a ▁brick ▁wall ▁with ▁eight ▁to wers ▁and ▁a ▁mo at . ▁The ▁port ▁of ▁M estre ▁benef ited ▁from ▁the ▁economic ▁power ▁of ▁the ▁Republic ▁of ▁Ven ice , ▁forming ▁Ven ice ' s ▁main ▁connection ▁with ▁the ▁main land . ▁A ▁canal ▁( the ▁Canal ▁Sal so ) ▁was ▁built ▁to