A member of Hungary's ruling conservative coalition on Sunday attacked the 1920 Treaty of Trianon that after WWI reduced Hungary to two-thirds of its former size, the MTI news agency reported.

Minister of Agriculture and Rural Development Jozsef Torgyan described the treaty as "predatory" and "unjust" just a week after a fellow minister in the main coalition party ruled out any bid for a revision of the treaty.

Torgyan, head of the Independent Smallholders' Party, the second-strongest party in the three-way coalition, was speaking in the northern village Zebegeny, inaugurating a memorial to the 1920 post-war treaties.

"Now, on the 80th anniversary of the tragedy, we must say that the Trianon peace dictate was a predatory dictate, it was an unjust treaty," he said.

"It was created on principles that overthrew basic human rights and trampled underfoot all the achievements of western civilization," Torgyan added.

Hungary sided with Germany and Austria in World War I. After its allies lost the war, Hungary's borders were radically redrawn by a peace treaty signed on June 4, 1920 in the Grand Trianon Palace at Versailles, near Paris.

The Treaty of Trianon reduced Hungary's territory and population by about a third leaving Hungarian ethnic minorities displaced across the central-European region, including Romania and Slovakia.

"For us not to speak about this, not to question through polemics whether we have the right to commemorate these things equals to shocking, Middle-Age behavior which has nothing to do with basic human rights," said Torgyan.

"It is like forbidding a mother to weep over the coffin of her (dead) child," he added.

"At the time of signing the treaty, national sovereignty was a fundamental freedom right across the world. Still, this principle was rejected in Trianon, and decisions were brought to the disadvantage of Hungarians," he said.

"We should look at finding a way out of this situation," Torgyan added.

At the ceremony, pastors and priests of Hungary's historical churches blessed the memorial, which was built in 1938. Representatives of Hungarian minorities beyond Hungary's borders placed lumps of earth from their region at its foot.

Last week, Hungary's Foreign Minister Janos Martonyi sharply rejected a proposal by the World Federation of Hungarians, an umbrella organization of Hungarian minorities and Diaspora over the world, to push for a revision of the treaty.

"Hungary's foreign policy remains unchanged ... Hungary has no intention of replacing borders," Martonyi said.

Martonyi is a member of the Federation of Young Democrats-Hungarian Civic Party (Fidesz-MPP), the largest party in the ruling coalition.

Torgyan's Smallholders party, which has 49 seats in Hungary's 386-seat Parliament, was due to hold a commemoration of the Treaty of Trianon in Budapest later on Sunday.