Palestinians around the world are marking 100 years since the Balfour Declaration was issued on November 2, 1917. It was contained in a letter written by the then British Foreign Secretary Arthur Balfour to Lord Walter Rothschild, who was a leader of Britain's Jewish community.
In the letter, Balfour expressed his support for "the establishment in Palestine of a national home for the Jewish people".
The declaration, which is only 67 words long, is widely celebrated by Israelis. But Palestinians regard it as a betrayal which triggered the colonisation of their land.
Al Jazeera's Barnaby Phillips explains.