Laurent Prache was a French politician who was deputy mayor of Paris (or the Seine department as it was then called).
His image is above the sign.
The medallion was made by François de Hérain
The garden was photographed on the same day Click for a larger image
More details can be found on the next sign Click for sign's details Translation of the text on the sign
1856 - 1919
LAWYER AT THE COURT OF APPEALS
MUNICIPAL COUNCILOR AND PARIS DEPUTY: 1890-1910