Built in 1858 by Alexander Amos & Co., This is the oldest public building in Maryborough, and is built from yellow Porphyry stone supplied locally by the Bristol Hill Quarry. The Gold Chamber was first used as a Court House, then later as a Mining Board Office. Sandstone building in the current Maryborough Hospital precinct. alexander amos, maryborough gold chamber, maryborough court house, maryborough mining board office, porphyry stone, bristol hill quarry