Johan Albrecht Ehrenström
Johan Albrecht Ehrenström ( 28 August 1762 – 15 April 1847 ) was a notable Finnish politician and official who is best remembered as the designer of Helsinki city plan . 
<triplet> Johan Albrecht Ehrenström <subj> 28 August 1762 <obj> date of birth <subj> 15 April 1847 <obj> date of death