The Tanzimât (Ottoman Turkish: تنظيمات), literally meaning reorganization of the Ottoman Empire, was a period of reformation that began in 1839 and ended with the First Constitutional Era in 1876. The Tanzimât reform era was characterized by various attempts to modernize the Ottoman Empire and to secure its territorial integrity against nationalist movements from within and aggressive powers from outside of the state. The reforms encouraged Ottomanism among the diverse ethnic groups of the Empire, attempting to stem the tide of nationalist movements within the Ottoman Empire.