▁most ▁notable ▁for ▁his ▁design ▁and ▁construction ▁of ▁the ▁pul p its ▁at ▁Str as bourg ▁C athedral ▁and ▁Notre - D ame - de - la - N ativ ité ▁in ▁Sa ver ne . ▁ ▁References ▁ ▁Category : G erman ▁architect s ▁Category : St on em asons ▁Category : St one ▁car vers ▁Category : 1 4 4 0 s ▁birth s ▁Category : 1 5 1 9 ▁death s ▁Category : Med ieval ▁German ▁sculpt ors <0x0A> </s> ▁Ja an ▁Sar v ▁( ; ▁ 2 1 ▁December ▁ 1 8 7 7 ▁– ▁ 2 3 ▁August ▁ 1 9 5 4 ) ▁was ▁an ▁Est onian ▁math ematic ian ▁and ▁educ ator . ▁Most ▁of ▁his ▁life ▁he ▁worked ▁as ▁a ▁professor ▁at ▁the ▁University ▁of ▁T art u . ▁Sar v ▁laid ▁the ▁foundation ▁of ▁Est onian ▁language ▁mathematical ▁education . ▁ ▁References ▁ ▁" E esti ▁k ool imat ema at ika ▁a jal ug u " ▁I - IV , ▁O la f ▁Prin its , ▁T art u , ▁ 1 9 9 2 – 1 9 9 4 ▁▁ ▁Category : 1 8 7 7 ▁birth s ▁Category : 1 9 5 4 ▁death s ▁Category : Pe ople ▁from ▁R õ uge ▁Par ish ▁Category : Pe ople ▁from ▁the ▁Governor ate ▁of ▁Liv onia ▁Category : E ston ian ▁mathemat icians ▁Category : H ugo ▁Tre ff ner ▁G ymnasium ▁al umn i ▁Category : Univers ity ▁of ▁T