This page serves as an index of the century and decade pages of the encyclopedia. 2nd Century BT 180s BT 170s BT 160s BT 150s BT 140s BT 130s BT 120s BT 110s BT 1st Century BT 100s BT 90s BT 80s BT 70s BT 60s BT 50s BT 40s BT 30s BT 20s BT 10s BT 1st Century AT 0s AT 10s AT 20s AT 30s AT 40s AT 50s AT 60s AT 70s AT 80s AT 90s AT 2nd Century AT 100s AT 110s AT 120s AT 130s AT 140s AT 150s AT 160s AT 170s AT 180s AT 190s AT 3rd Century AT 200s AT 210s AT 220s AT 230s AT 240s AT 250s AT 260s AT 270s AT 280s AT 290s AT 4th Century AT 300s AT 310s AT 320s AT 330s AT 340s AT 350s AT 360s AT 370s AT 380s AT 390s AT 5th Century AT 400s AT 410s AT 420s AT 430s AT 440s AT 450s AT 460s AT 470s AT 480s AT 490s AT 6th Century AT 500s AT 510s AT 520s AT 530s AT 540s AT 550s AT 560s AT 570s AT 580s AT 590s AT 7th Century AT 600s AT 610s AT 620s AT 630s AT 640s AT 650s AT 660s AT 670s AT 680s AT 690s AT 8th Century AT 700s AT 710s AT 720s AT 730s AT 740s AT 750s AT 760s AT 770s AT 780s AT 790s AT 9th Century AT 800s AT 810s AT 820s AT 830s AT 840s AT 850s AT 860s AT 870s AT 880s AT 890s AT 10th Century AT 900s AT 910s AT 920s AT 930s AT 940s AT 950s AT 960s AT 970s AT 980s AT 990s AT 11th Century AT 1000s AT 1010s AT 1020s AT 1030s AT 1040s AT 1050s AT 1060s AT 1070s AT 1080s AT 1090s AT 12th Century AT 1100s AT 1110s AT 1120s AT 1130s AT 1140s AT 1150s AT 1160s AT 1170s AT 1180s AT 1190s AT 13th Century AT 1200s AT 1210s AT 1220s AT 1230s AT 1240s AT 1250s AT 1260s AT 1270s AT 1280s AT 1290s AT 14th Century AT 1300s AT 1310s AT 1320s AT 1330s AT 1340s AT 1350s AT 1360s AT 1370s AT 1380s AT 1390s AT 15th Century AT 1400s AT 1410s AT 1420s AT 1430s AT 1440s AT 1450s AT 1460s AT 1470s AT 1480s AT 1490s AT