Tensions within the EU, Victor Orban publishes a photo of “Great Hungar”

Hungary's prime minister showed his support for students who received the results of their exams on Wednesday, accompanying the message with an image of the former Hungarian territory before the end of World War I.

This historic territory included large parts of modern Croatia, Serbia, Romania and Slovakia all lost under the 1920 Trianon Treaty after the fall of the combined Austro-Hungarian state.

Hungary lost about two-thirds of its territory, and some citizens in the country consider the treatment a national tragedy. Similar maps have been shown in right - hand rallies.

The leaders of the two neighbouring countries have responded to this Facebook gesture.

On Thursday, Croatian President Zoran Milanovic urged students not to publish any old maps on social media.

“In our cabinets and archives, there are many historical cards and maps showing our homeland much larger than it is today,” wrote Milanovic on Facebook, adding that other European countries will also have similar claims.

Don't put them in your profile and they're not relevant or effective today, and most importantly, they're constantly bothering our neighbors. ”

“Croatia is a modern European nation and country... learn from history, but look to the future. ”

Croatia's Foreign Minister, Gordan Grliić Radman, has also added that relations between Hungary and Croatia are excellent, but that territorial claims were unimaginable in the EU.

This is not the first time that Orbán has shared images of Hungary's <x0historic” map, and the Croatian prime minister said in December that his government “will hold talks with the Hungarian side” on such issues.

Moreover, Romania's Prime Minister Ludovic Orban reacted sarcastically to his Hungarian counterpart late Wednesday, using a Romanian proverb.

Hundreds of Romanian users have also responded to Victor Orbán on Facebook.

Romania remains home to a large ethnic Hungarian community, but on Wednesday, the country's parliament rejected an initiative to announce the officialisation of Hungarian language in Transylvania.

The decision had prompted an angry reaction by the Democratic Union of Hungarians in Romania (UDMR), who are closely linked to Victor Orbán's Fidesz party.

“We are looking for what the constitution predicts,” said UDMR on Facebook.