Corpus separatum (Latin for "separated body") was the internationalization proposal for Jerusalem and its surrounding area as part of the United Nations Partition Plan for Palestine. It was adopted by the United Nations General Assembly with a two-thirds majority in November 1947. According to the Partition Plan, the city of Jerusalem would be brought under international governance, conferring it a special status due to its shared importance for the Abrahamic religions. The corpus separatum was one of the main issues of the Lausanne Conference of 1949, besides the borders of Israel and the question of the Palestinian right of return.

The Partition Plan was not implemented, being firstly rejected by Palestinian and other Arab leaders and then overtaken by the 1948 Arab–Israeli War, which left Jerusalem split between Israel (West Jerusalem) and Jordan (East Jerusalem). Presently, there is generally wide international support for the view that Jerusalem should be a dual capital, with an even split between Israel and the State of Palestine, although exact positions are divided.