Turkey will choose its new president and MPs on June 24 and will become a presidential republic from a parliamentary one, as a result of last year's referendum. Here we explain the changes that will come into effect following the elections.
Ireland will vote to repeal the Eighth Amendment of the constitution which recognises the equal right to life of the unborn and the mother. An abortion can only take place in case the life of the mother is at risk.
Sunday's referendum has featured seven questions including reintroducing term limits to prevent presidents from running indefinitely.
Catalan leaders pledge to hold the binding independence referendum, in a move the Constitutional Court has deemed illegal.
Venezuelan President Nicolas Maduro urges Venezuelans to vote peacefully and with "respect for others" in an unofficial referendum organised by the opposition on Sunday.
Three ministers have resigned expressing doubts over the referendum on independence from Spain planned for October 1 as Madrid piles pressure on the regional Catalonia government.
The United Nation said the Venezuelan government should allow people to vote in the unofficial referendum on the constitution as the number of applications for asylum have soared.
Iraq's Kurdish leader Masoud Barzani says he expects a "yes vote" in favour of independence in the referendum on September 25.
The Turkish government, accusing Germany of double standards and making the decision to appease voters in Germany's upcoming federal elections.
Despite the low level of participation, Puerto Rican Governor Ricardo Rossello said he would defend the result of the referendum that backed the territory becoming the 51st US state.
The US territory heads to the polls for the fifth time to decide whether to become America's 51st state. The voters have two choices: statehood or independence/free association.
Iraq's northern city of Kirkuk becomes a disputed area as the local provincial council decides to conduct a referendum on its status.
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