Terpene October 14, 2016October 24, 2016 thcscience_admin Transport portalEngineering portal This category is for transport infrastructure completed in the year 1781. 17761777177817791780178117821783178417851786 1730s1740s1750s1760s1770s1780s1790s1800s1810s1820s1830s Subcategories This category has only the following subcategory. C Canals opened in 1781 (1 P)