In the year 1334 , the castle was completed and was at its largest . A few years later , the castle was damaged by the Basel earthquake on 18 October 1356 , but it was soon restored to its original condition . At this time Konrad VIII ( 1324-1378 ) , son of Hartmann I Münch von Münchenstein resided in Münchenstein castle . Konrad VIII ( called " Hape " ) married Katharina , the hereditary daughter from Löwenburg , in 1340 . Katharina Münch von Münchenstein-Löwenberg died in 1371 and Konrad VIII inherited governance of Muttenz and the three fortresses in the district Wartenburg
Basel earthquake
1356 Basel earthquake
Münchenstein Castle