Martyrs' Tomb
The Martyrs' Tomb was a monument erected by the planeswalker Freyalise on the shores of Urborg in memory of those who died during the Phyrexian Invasion. The monument listed the names of those who died during the war, and featured busts of Urza Planeswalker and Gerrard Capashen at its highest point.
According to the flavor text, it has the following inscription:
Honor the brave who fought
Honor the dead who fell
Honor the world they saved
It is known that the Martyrs' Tomb was a site still visited by many Dominarians at the time of Karona. It has not been seen since in the story, but is featured in the art of the card Heroes Remembered.