On 11 April 2010 , President Kaczyński 's body was returned to Poland , where he and his wife lay in state at the Presidential Palace in Warsaw . The state funeral was held in Kraków on 18 April 2010 . After a Roman Catholic mass at St. Mary 's Basilica , the presidential couple were laid to rest in a coffin , which was placed in the antechamber of the Crypt Under the Tower of Silver Bells beneath the Wawel Cathedral . A significant number of foreign dignitaries were unable to attend the funeral as a result of air travel disruption in Europe following the eruption of the volcano Eyjafjallajökull in Iceland
Eyjafjallajökull
2010 eruptions of Eyjafjallajökull
Lech Kaczyński