The Sheikh Zayed Grand Mosque's design and construction "unites the world", using artisans and materials from many countries including India, Italy, Germany, Morocco, Pakistan, Turkey, Malaysia, Iran, China, United Kingdom, New Zealand, Republic of Macedonia and United Arab Emirates. More than 3,000 workers and 38 renowned contracting companies took part in the construction of the mosque. Natural materials were chosen for much of its design and construction due to their long-lasting qualities, including marble stone, gold, semi-precious stones, crystals and ceramics. It was built by the Italian company Impregilo. I was involved in this project in 1999, after the bachelor in architecture. My role was to attend at the Islamic decorations engineering: marbles, mosaics, woods, gypsum, the external and internal skins of the building.