LONDON, Dec 7 (Thomson Reuters Foundation) - Australia on Thursday became the 26th nation to legalise same-sex marriage, following a postal survey in which Australians overwhelmingly voted in support of formalising the unions.

The laws, which will also recognise same-sex marriages carried out in foreign countries, take effect from Saturday. Because a month's notice is required for the state to recognise a marriage, the first legal same-sex unions will be in January.

Lawmakers, who had cast aside a conservative push to allow religious objectors to refuse service to same-sex couples, waved rainbow flags and embraced in parliament, where earlier in the debate a politician had proposed to his same-sex partner.

Here are some facts about same-sex marriage around the world:

* Same-sex marriage is legal in 26 nations: Argentina, Australia, Belgium, Brazil, Britain, Canada, Colombia, Denmark, Finland, France, Germany, Greenland, Iceland, Ireland, Luxembourg, Malta, Mexico, Netherlands, New Zealand, Norway, Portugal, South Africa, Spain, Sweden, Uruguay, United States.

Read More:Australia Just Legalized Gay Marriage and People Can't Stop Celebrating

*It is also set to become legal soon in Austria and Taiwan, following court rulings on the matter this year.

* In some of these countries, such as Mexico and Britain, marriage is only open to same-sex couples in some regions. Northern Ireland is the only part of the United Kingdom where same-sex marriage is not allowed.

* The first country to legalise same-sex marriage was the Netherlands in 2001.

* Some Australian states ruled homosexual acts to be illegal until just 20 years ago.

Read More: Fewer Teens Tried to Take Their Lives Once Gay Marriage Was Legal

* In Africa, where homosexuality is a crime in many countries and can lead to imprisonment or the death penalty, South Africa alone has granted the same access to gay couples. Same-sex marriage legislation came into force there in 2006.

* No countries in Asia allow same-sex couples to marry or enter civil unions of any kind. In May, Taiwan's constitutional court ruled that same-sex couples have the right to legally marry, the first such ruling in Asia.

* Almost one in three adults globally believe people of the same sex should be allowed to marry, a survey of almost 100,000 people in 65 countries showed in 2016.

We see you Australia. 🎉🎉 #marriageequality#LoveWinspic.twitter.com/BIV9uaY5rz

— The Sims (@TheSims) December 7, 2017

SOURCES: International Lesbian, Gay, Bisexual, Trans and Intersex Association (ILGA), Pew Research Center, Reuters.

(Reporting by Umberto Bacchi @UmbertoBacchi and Magdalena Mis @magdalenamis1; Editing by Katy Migiro. Please credit the Thomson Reuters Foundation, the charitable arm of Thomson Reuters, that covers humanitarian news, women's rights, trafficking, property rights, climate change and resilience. Visit http://news.trust.org)