De expugnatione Lyxbonensi
De expugnatione Lyxbonensi ( "On the Conquest of Lisbon" ) is an eyewitness account of the Siege of Lisbon at the start of the Second Crusade , and covers the expedition from the departure of the English contingent on 23 May 1147 until the fall of Lisbon on 28 June 1148 . 
<triplet> Siege of Lisbon <subj> Second Crusade <obj> part of