A reusable architectural wall is provided which provides a cost-effective space-dividing wall structure formed of internal support rails joined by a lightweight, cost effective facing panel on each panel side, which preferably is formed of standard architectural materials such as gypsum board, R-board and the like. The wall is structurally rigid, field cuttable, installable horizontally or vertically and has a substantial acoustic reduction, cable carrying capacity, and HVAC capability.