Structurae is the International Database and Gallery of Structures. The information contained on the site is primarily aimed at civil engineers and architects; however, anyone with an interest in modern or historical structures should definitely review it. More than 3,000 structures are listed in the database, including facts about materials used in construction, size, date started, and date completed. Many of the entries also have photographs of the location. You can sort the structures by type, function, construction method, geographical location, or alphabetically; or you can browse a 2,500 year timeline. There are also separate databases of large-scale projects and notable engineers and architects.