Serbian painter and decorator; worthy collector of folk ornaments and crafts, on which basis he tried to establish a national decorative style, particularly Serbian. He was born in Split, under the name of Karlo Inkiostri, and on arrival in Belgrade changed his name to Dragutin, adding his mother's last name next to his father's, Medenjak. Finished primary school and five grades of secondary school , he started with painting, first as a self-taught (1885 - 1892) and then in Florence. At the end of 1905 comes to Belgrade where he remained until 1911, where he worked on the decoration of many important buildings. Since 1912 he was located in Bosnia where he worked patriotic posters, and was prosecuted by the Austrian authorities. During World War I he was in Italy and Trieste. For a time he lived in Ljubljana, and then in 1923 came back to Belgrade. He worked on the establishment of the original Yugoslav decorative styles, particularly Serbian. One of his most important works was the interior of the Vuk's Foundation building (then the building of the Ministry of Education) in Belgrade in 1912
Једно од његових најзначајнијих дела је уређење ентеријера Дома Вукове задужбине (тада зграда Министарства просвете) у Београду, 1912.