That would be Constantin Brâncuși.
Brâncuși was born in Hobita, Romania in 1876. He studied in three different countries, firstly in his native Romania in Bucharest, after which he studied in Germany in Berlin and finally in Paris, France at École des Beaux-Arts. He is considered to be a patriarch of the modern sculpting and one of the pioneers of modernism and certainly one of the most influential artists of the 20th century. His art can be described as representational art with symbolic allusions which he created through use of clean geometric lines.