1. http://www.crystalinks.com/romeaqueducts.html
http://www.unrv.com/culture/roman-aqueducts.php
2. http://www.smithsonianmag.com/history/the-secrets-of-ancient-romes-buildings-234992/?no-ist
http://www.ancient-origins.net/news-history-archaeology/researchers-discover-secret-recipe-roman-concrete-020141
3. http://www.crystalinks.com/romeroads.html
http://www.unrv.com/culture/roman-roads.php
4. http://www.tondering.dk/claus/cal/roman.php
http://www.calendar-origins.com/roman-calendar.html
5. http://www.ushistory.org/civ/6a.asp
http://info.teachtci.com/resources/gov/topic13.aspx
6. http://www.historylearningsite.co.uk/ancient-rome/roman-baths/
http://www.vroma.org/~bmcmanus/baths.html
7. http://quatr.us/romans/science/sewage.htm
http://www.waterhistory.org/histories/rome/
8. http://www.unrv.com/culture/latin-language.php
http://www.latinlanguage.org/latin/romanempire.asp
9. http://www.ancient.eu/Roman_Architecture/
http://www.crystalinks.com/romearchitecture.html
