Pietra dura (Italian) is a technique through which artisans embed semi-precious stones in the monuments. Known for their fabulous pietra dura work are Naulakha pavilion in Shish Mahal (Lahore Fort), Pillars of Shish Mahal, Cenotaph of Jahangir Tomb, Deewna-i-Khas in Lahore Fort, Moti Masjid and a fountain in Shalamar Gardens.