National Slag Collection
The National Slag Collection housed at Ironbridge comprises an enormous number of samples of archaeo-metallurgical residues. Most of this was collected and processed by the former Ancient Monuments Laboratory (now the English Heritage Centre for Archaeology) under the guidance of Leo Biek and Ronnie Tylecote. The collection includes samples from excavations undertaken on sites of all periods across the country since the second world war. The National Slag Collection has been augmented since 2000 with samples from recent excavations undertaken by Ironbridge Archaeology and others.