Between 1999 and 2010 over one hundred replica and reconstructed ancient Egyptian tools were transported to Egypt, being rigorously further tested, and analysed, under local conditions at sites relevant to the tools' ancient uses. For example, the surfaces of some blocks in the Great Pyramid at Giza, and the top surface of the Unfinished Obelisk at Aswan, were tested for accuracy with calibrated replica tools: other experiments at Luxor investigated the fitting of stone column segments in Karnak Temple, using experimentally manufactured stone segments.