<prompt> Translate the following text to EnglishMjenzi Sinan aliongeza minara mitatu ya juu na kuimarisha nguzo za juu za minara hiyo, na kuimarisha sehemu ya juu ya minara hiyo.  <response>: The architect, Sinan, strengthened the buttresses and added the other three minarets during the 16th century; the structure was last renovated in the 1840s. 