Turkey's European course will benefit its citizens, Greek President Prokopios Pavlopoulos said on Thursday as he welcomed Turkish President Recep Tayyip Erdogan to the Presidential Mansion.

For this visit to be historic, it required complete respect for international law and the European acquis, Pavlopoulos said.

The Treaty of Lausanne had laid the foundations for the friendship of the two countries and it was what should support that friendship, he added.

For us, the Treaty of Lausanne is non-negotiable and does not need to be revised, Pavlopoulos underlined to Erdogan.

Pavlopoulos also stressed the need for sincere respect for international law and the European acquis, saying that this was an obligation for both EU member-states and candidate countries.

The Greek president underlined the importance of straightforward dealings between friends, while adding that honesty was an important element of friendship.

Moreover, any dispute can only be solved peacefully and on the basis of International Law, Pavlopoulos said.

He also asked for a sincere implementation of the EU-Turkey Agreement on refugees, given that justice and humanity were core values.

There are some details in the Treaty of Lausanne that are not clear, Turkish President Recep Tayyip Erdogan said on Thursday in a meeting with Greek President Prokopios Pavlopoulos.

You have expressed some truths, openly and straightforwardly. There are some details in the Treaty of Lausanne, which are not properly understood. This is an agreement signed 94 years ago and not just between Greece and Turkey, Erdogan said after the official reception at the Presidential Mansion.