Hello Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947)