Ludwik Hieronim Morstin (12 December 1886, Pławowice – 12 May 1966, Warsaw) was a soldier, diplomat, editor and poet.

He was educated at the Jan III Sobieski High School in Kraków and between 1906 and 1910 continued his studies in Munich, Berlin and Paris.

Immediately after the war Morstin served in the Regency Council as well as on diplomatic missions to Paris (1919–1922) and Rome (1922–1924).

When the Second World War ended in 1945 Morstin donated the Palace of Pławowice, park and his personal library to the Circle of Polish Writers.

After a period of poor management and lack of financial acumen the Government took over the estate, exported the library to Warsaw and housed peasant families within the palace itself.