Sentence:  <WSD>Multicameral</WSD> buildings may be planned as such from the beginning, such as the mausoleums, which have a ziyarat khaneh (antechamber); or they may have acquired additions over several generations, as did many of the tomb towers in Mazanderan. 
Meaning of the word marked with <WSD> tags:  Having multiple chambers; consisting of three or more enclosed spaces; multicamerate.