President Marie-Louise Coleiro Preca today joined US President Barack Obama, Poland's President Bronislaw Komorowski and leaders from Central and Eastern Europe for a ceremony marking the "Freedom Day" - the 25th anniversary of Poland's first partially-free elections.
Those elections led to the victory of the Solidarity trade union and the end of communist rule.
TVM reported that Ms Coleiro-Preca invited President Obama to visit Malta.
The ceremony was also attended by Speaker Anglu Farrugia.