. ▁Among ▁the ▁best ▁were ▁those ▁of ▁Y ek ater ina ▁Pav lov na ▁Bak un ina , ▁John ▁Cap od ist ria , ▁ ▁Natal ya ▁Gon char ova - Push k ina , ▁wife ▁of ▁the ▁Russian ▁poet ▁Alexander ▁P ush kin ▁and ▁Y ek ater ina ▁Ivan ov na ▁Zag ry az h sk aya , ▁her ▁a unt . ▁He ▁also ▁did ▁illustr ations ▁for ▁books ▁and ▁mag az ines . ▁ ▁In ▁ 1 8 3 1 , ▁after ▁his ▁return ▁to ▁Russia , ▁he ▁was ▁appointed ▁professor ▁at ▁the ▁Imperial ▁Academy ▁of ▁Arts ▁and ▁these ▁were ▁the ▁years ▁when ▁he ▁created ▁his ▁best ▁architect ural ▁projects . ▁Among ▁others , ▁he ▁designed ▁and ▁super vised ▁the ▁construction ▁of ▁the ▁following ▁buildings ▁in ▁Saint ▁Petersburg : ▁ ▁Mik h ail ov sky ▁Theatre ▁( now ▁M ali y ▁Theater , ▁ 1 8 3 1 – 1 8 3 3 ) ▁Luther an ▁Church ▁of ▁Saint ▁Peter ▁and ▁Saint ▁Paul ▁on ▁Nev sky ▁Pro spe kt ▁( 1 8 3 3 – 1 8 3 8 ) ▁P ulk ovo ▁Observ atory ▁( 1 8 3 4 – 1 8 3 9 ) ▁The ▁Guard ▁Corps ▁Head quarters ▁on ▁Palace ▁Square ▁( 1 8 3 7 – 1 8 4 3 ). ▁ ▁He ▁was ▁one ▁of ▁the ▁principal ▁architect s ▁for ▁the ▁reconst ruction ▁of ▁the ▁Winter ▁Palace ▁after ▁the ▁fire ▁of ▁ 1 8 3 7 . ▁He ▁designed ▁many ▁striking ▁inter iors ▁there , ▁including