A four-part referendum was held in Ukraine on 16 April 2000. The referendum was called by President Leonid Kuchma, and asked voters whether they approved of four amendments to the constitution that would increase the powers of the President and introduce an upper chamber.
A constitutional referendum was held in Greece on 15 November 1968. Voters were asked whether they wished to ratify a new constitution prepared by the dictatorial regime. It was approved by 92.1% of voters, with a voter turnout of 77.7%.
A constitutional referendum was held in France on 5 May 1946. Voters were asked whether they approved of a new draft Constitution proposed by the Constituent Assembly elected in 1945.
A constitutional referendum was held in France on 13 October 1946. Voters were asked whether they approved of a new constitution proposed by the Constituent Assembly elected in June. Unlike the May referendum, which saw a previous constitutional proposal rejected, the new constitution was accepted by 53.2% of voters, and brought the French Fourth Republic into existence. Voter turnout was 67.6%.
A constitutional referendum was held in France on 28 September 1958. Voters were asked whether they approved of the adoption of a constitution for the French Fifth Republic written by Charles de Gaulle. It was overwhelmingly approved, with 82.6% in favour. Voter turnout was 84.9% in Metropolitan France and 79.8% overall.
A constitutional referendum was held in Denmark on 6 September 1920. It was held in order to make changes to the constitution of Denmark from 1915 that had been made necessary to facilitate the reunification of Southern Jutland into the kingdom of Denmark. The changes were approved by 96.9% of voters, with a 49.6% turnout. A total of 614,227 of the 1,291,745 registered voters voted in favour, meaning that 47.6% of eligible voters had voted for the proposals, above the 45% required by the constitution.
A constitutional referendum was held in Poland on 25 May 1997. Voters were asked whether they approved of a new constitution. It was narrowly approved, with 53.5% voting in favour. Voter turnout was just 42.9%. Although the 1995 Referendum Act stated that a 50% turnout was required to validate the referendum, the Supreme Court ruled on 15 July that the constitution could be introduced.
A constitutional referendum was held in Romania on 8 December 1991. The new constitution was approved by 79.1% of voters.
A constitutional referendum was held in Romania on 18 and 19 October 2003. The proposed amendments to the constitution were approved by 91.1% of voters.
A constitutional referendum was held in Switzerland on 6 June 1848. The new constitution was approved by 72.8% of voters and a majority of cantons.
A constitutional referendum was held in Switzerland on 19 April 1874. The new constitution was approved by 63.2% of voters and a majority of cantons. It gave more responsibilities and powers to the federal government.
Three referendums were held in Switzerland in 1882. Two were held on 30 July on copyright law and measures against epidemics, both of which were rejected. The third was held on 26 November on executing article 27 of the federal constitution, and was rejected by 64.9% of voters.
Two referendums were held in Switzerland in 1887. The first was held on 15 May, asking voters whether they approved of a federal law on spirits, and was approved by 65.9% of voters. The second was held on 10 July, asking voters whether they approved of an amendment made to article 64 of the federal constitution, and was approved by 77.9% of voters and 20.5 cantons.
A referendum on accident and health insurance was held in Switzerland on 2 October 1890. Voters were asked whether they approved of a federal resolution on amending the constitution with regards to accident and health insurance. It was approved by a majority of voters and cantons.
A referendum on animal protection was held in Switzerland on 20 August 1893. Voters were asked whether they approved of prohibiting butchering without the animals being anaesthetised. The proposal was approved by 60.1% of voters and a narrow majority of cantons.
A referendum on a war tax was held in Switzerland on 6 June 1915. Voters were asked whether they approved of amending the constitution to introduce a one-off war tax. It was approved by a large majority of voters and all cantons, the first time a referendum had been passed in every canton.
Three referendums were held in Switzerland during 1908. The first two were held on 5 July on amending the federal trade law and on banning absinthe. Both were approved by a majority of voters and cantons. The third was held on 25 October on adding article 24bis to the constitution, concerning hydroelectricity and electricity. It was also approved by a majority of voters and cantons.
Five referendums were held in Switzerland during 1931. The first was held on 8 February on a federal resolution on a petition for a referendum on article 12 of the constitution concerning bans on religious orders, and was approved by a majority of voters and cantons. The second and third were held on 15 March on revising article 72 of the constitution concerning the election of the National Council and on revising article 76, 96 and 105 on the legislative term. Both were approved. The fourth and fifth were held on 6 December on a federal law on aged and bereavement insurance and a federal law on tobacco taxation. Both were rejected.
Nine referendums were held in Switzerland in 1975. The first was held on 2 March on an amendment to the Swiss Federal Constitution on the article on the economic cycle. Although it was approved by a majority of voters, it did not receive the support of a majority of cantons, so was rejected. The next five were held on 8 June on protecting currency (approved), financing the national road network (approved), amending the general tariff (rejected), increasing taxes the following year (approved) and restricting federal expenditure (approved). The final three were held on 7 December on a constitutional amendment on the right to residence and welfare benefits (approved), a constitutional amendment on water management (approved) and a federal law on the import and export of agricultural goods (approved).
Fourteen referendums were held in Switzerland in 1978. The first four were held on 26 February on a popular initiative "for more co-decisions of the Federal Assembly and the People on national road making" (rejected), an amendment to the federal law on aged and bereaved insurance (approved), a popular initiative to lower the retirement age (rejected) and amending the article on the economic cycle in the Swiss Federal Constitution (approved). The next five referendums were held on 28 May on a law on time (rejected), an amendment to the tariff law (approved), a new federal law banning abortion (rejected), a federal law on promoting research and universities (rejected) and a popular initiative "for 12 Sundays a year free from motor vehicles" (rejected).
