dug (near the location of the present bell), with a clay form, and walls reinforced with rammed earth to withstand the pressure of the molten metal. Obtaining the necessary metals proved a challenge, for in addition to the parts of the old bell, an additional of silver and of gold were added to the mixture. After months of preparation, casting work commenced at the end of November 1734. The first attempt was not successful, and the project was incomplete when Ivan Motorin died in August, 1735. His son Mikhail carried on the work, and the second attempt at casting succeeded on November 25, 1735. Ornaments were added as the bell was cooling while raised above the casting pit through 1737. However, before the last ornamentation was completed, a major fire broke out at the Kremlin in May 1737. The fire spread to the temporary wooden support structure for the bell, and fearing damage, guards threw cold water on it, causing eleven cracks, and a huge slab to break off. The fire burned through the wooden supports, and the damaged bell fell back into its casting pit. The Tsar Bell remained in its pit for almost a century. Unsuccessful attempts to raise it were made in 1792 and 1819. Napoleon Bonaparte, during his occupation of Moscow in 1812, considered removing it as a trophy to France, but was unable to do so, due to its size and weight. It was finally successfully raised in the summer of 1836 by the French architect Auguste de Montferrand and placed on a stone pedestal. The broken slab alone is nearly three times larger than the world's largest bell hung for full circle ringing, the tenor bell at Liverpool Cathedral. For a time, the bell served as a chapel, with the broken area forming the door. Voltaire once joked that the Kremlin's two greatest items were a bell which was never rung and a cannon (the Tsar Pushka) that was never fired. Computational simulation of sound In the spring of 2016, a team of University of California, Berkeley; Stanford University; and University of Michigan researchers publicly performed an electronic reproduction of how the Tsar Bell would sound if it had not been damaged during casting. To simulate the sound of the bell, the team researched the bell's material characteristics and constructed a polygon mesh that modeled the shape of the bell. The team then used