 Laborde then organized 20,000 forced labourers to build an industrial complex in Mantasoa, closer to water, wood, and iron ore.There, 1,200 workmen produced cannon, swords, bricks, tiles, pottery, glass, porcelain, silk, soap, candles, sealing-wax, lime, cement, charcoal, ink, dyes, sugar, rum, sulphuric acid, and lightning conductors.Laborde also constructed Rainiharo's tomb, and the Queen's Palace.