He was influenced by the reformist ideals of the time in which he was growing up, as expounded by figures such as C. A. Rosetti, Cezar Bolliac and Mihail Kogălniceanu.
[3] An economic protectionist, he supported a customs tariff in the belief that it would spur the development of domestic industry.
[1] At the end of his third term, in the midst of World War I, he was involved in the decision to send the Romanian Treasure to Russia for safekeeping.
[2] The Black Sea resort of Costinești is named after Costinescu, who purchased a 200-hectare estate from Vasile Kogălniceanu.
He found an arid, treeless landscape, inviting German colonists to settle and work the land.