▁the ▁k urg an ▁ ▁fun eral ▁paths ▁from ▁the ▁mo at ▁or ▁bul w ark . ▁ ▁Depending ▁on ▁the ▁combination ▁of ▁these ▁elements , ▁each ▁historical ▁and ▁cultural ▁nom adic ▁zone ▁has ▁certain ▁architect ural ▁dist in ctions . ▁ ▁Pre - S cy th ian - S aka - S ib i rian ▁k urg ans ▁( B ron ze ▁Age ) ▁In ▁the ▁Bron ze ▁Age , ▁k urg ans ▁were ▁built ▁with ▁stone ▁rein for c ements . ▁Some ▁of ▁them ▁are ▁believed ▁to ▁be ▁S cy th ian ▁bur ial s ▁with ▁built - up ▁soil , ▁and ▁emb ank ments ▁rein for ced ▁with ▁stone ▁( O l hov sky , ▁ 1 9 9 1 ). ▁ ▁Pre - S cy th ian - S aka - S ib i rian ▁k urg ans ▁were ▁surface ▁k urg ans . ▁Wood en ▁or ▁stone ▁tomb s ▁were ▁constructed ▁on ▁the ▁surface ▁or ▁under ground ▁and ▁then ▁covered ▁with ▁a ▁k urg an . ▁The ▁k urg ans ▁of ▁Bron ze ▁culture ▁across ▁Europe ▁and ▁Asia ▁were ▁similar ▁to ▁housing ; ▁the ▁methods ▁of ▁house ▁construction ▁were ▁applied ▁to ▁the ▁construction ▁of ▁the ▁tomb s . ▁K urg an ▁Ak - su ▁- ▁A ü ly ▁( 1 2 th – 1 1 th ▁centuries ▁BC ) ▁with ▁a ▁tomb ▁covered ▁by ▁a ▁py ram idal ▁tim ber ▁roof ▁under ▁a ▁k urg an ▁has ▁space ▁surrounded ▁by ▁double ▁walls ▁serving ▁as ▁a ▁by pass ▁cor