1156 was a leap year.
|Centuries:||11th century – 12th century – 13th century|
|Decades:||1120s 1130s 1140s – 1150s – 1160s 1170s 1180s|
|Years:||1153 1154 1155 – 1156 – 1157 1158 1159|
- Establishment of the Carmelite Order
- Hogen Rebellion in Japan
- January 20 – According to legend, freeholder Lalli slays English crusader Bishop Henry with an axe on the ice of the lake Köyliönjärvi in Finland.
- The Privilegium Minus elevates Austria to the status of a duchy ruled by the Babenburgs family. (see History of Austria).
- Mosan artists create the Stavelot Triptych, a masterpiece of goldsmithing, as a reliquary to house purported pieces of the True Cross.