Terpene October 14, 2016October 24, 2016 thcscience_admin Transport portalArchitecture portalThis category is for bridges completed in the decade 1720s, i.e. in the years 1720 to 1729 1670s1680s1690s1700s1710s1720s1730s1740s1750s1760s1770s 13th14th15th16th17th18th19th20th21st22nd23rd Subcategories This category has the following 2 subcategories, out of 2 total. 0–9 Bridges completed in 1720 (3 P) Bridges completed in 1726 (1 P)