▁facing ▁the ▁entering ▁visitor . ▁ ▁Most ▁of ▁Bath ' s ▁buildings ▁are ▁made ▁from ▁the ▁local , ▁golden - col oured , ▁Bath ▁Stone . ▁The ▁dominant ▁architect ural ▁style ▁is ▁Georg ian , ▁which ▁evol ved ▁from ▁the ▁P all ad ian ▁rev ival ▁style ▁that ▁became ▁popular ▁in ▁the ▁early ▁ 1 8 th ▁century . ▁The ▁city ▁became ▁a ▁fashion able ▁and ▁popular ▁sp a ▁and ▁social ▁centre ▁during ▁the ▁ 1 8 th ▁century . ▁Based ▁initially ▁around ▁its ▁hot ▁spr ings , ▁this ▁led ▁to ▁a ▁demand ▁for ▁substantial ▁homes ▁and ▁guest ▁houses . ▁The ▁key ▁architect s , ▁John ▁Wood ▁and ▁his ▁son , ▁laid ▁out ▁many ▁of ▁the ▁city ' s ▁present - day ▁squares ▁and ▁cres c ents ▁within ▁a ▁green ▁valley ▁and ▁the ▁surrounding ▁hills . ▁According ▁to ▁UN ES CO ▁this ▁provided ... ▁" an ▁integration ▁of ▁architecture , ▁urban ▁design , ▁and ▁landscape ▁setting , ▁and ▁the ▁deliber ate ▁creation ▁of ▁a ▁beautiful ▁city ". ▁Development ▁during ▁modern ▁er as , ▁including ▁the ▁development ▁of ▁the ▁transport ▁infrastr ucture ▁and ▁re building ▁after ▁bomb ▁damage ▁during ▁World ▁War ▁II , ▁has ▁mostly ▁been ▁in ▁keeping ▁with ▁earlier ▁styles ▁to ▁maintain ▁the ▁integrated ▁city s cape . ▁ ▁C elt ic , ▁Roman ▁and ▁Sax on ▁▁ ▁Build ings ▁from ▁Bath ' s ▁pre - N orm an ▁period ▁either ▁no ▁longer ▁exist , ▁or ▁their ▁remains ▁are ▁below ▁street ▁level . ▁Arch ae ological ▁sites ▁in ▁the ▁central ▁area ▁of ▁the