Career
He is credited for much of the modern urban development of the city. He held the office of mayor in five separate terms: 1883-1886, 1889–1890, 1890–1892, 1895–1899 and 1901-1905. He initiated a project to build the Communal Palace, present-day city hall of Buzău, as well as a new courthouse building.
The pallace was finished in 1903.
Constantinescu ordered, also, improvements to be made on the Crâng park, a large park carved in a forest at the outskirts of the city. The Nicolae Bălcescu Boulevard, constructed at the same time, connects the Communal palace in the city center to the Crâng park.
