The Temple Mount Sifting Project is an archaeological project established in 2005 and dedicated to recovering archaeological artifacts from the 300 truckloads of topsoil removed from the Temple Mount by the Waqf during the construction of the underground el-Marwani Mosque from 1996-1999. By 2006, the project had recovered numerous artifacts dating from the 8th to 7th centuries BCE from dirt removed in 1999 by the Islamic Religious Trust (Waqf) from the Solomon's Stables area of the Temple Mount. These include stone weights for weighing silver and a First Temple period bulla, or seal impression, containing ancient Hebrew writing, which may have belonged to a well-known family of priests mentioned in the Book of Jeremiah.