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Enrique III cede ante las demandas de su hijo Eduardo I de Inglaterra solicitando ayuda para luchar contra los galeses (ver año 1256 ). Se une a él en una campaña para recuperar los territorios perdidos por las fuerzas galesas dirigidas por Llywelyn ap Gruffydd.
January 13 – At the first recorded meeting of the college of the seven Electors of the Holy Roman Empire, the 48-year-old Richard of Cornwall (the brother of King Henry III of England) is elected King of the Romans. He is crowned at Aachen, on May 17.
1 de oct. de 2013 · In 1257 A.D., a massive volcano erupted, spreading ash all over the world. The explosion was so big that scientists can see its chemical signal as far away as the Arctic and Antarctic.
PSR B1257+12, previously designated PSR 1257+12, alternatively designated PSR J1300+1240, is a millisecond pulsar located 2,300 light-years (710 parsecs) from the Sun in the constellation of Virgo, rotating at about 161 times per second (faster than a blender's blade).
In 1257, a catastrophic eruption occurred at Samalas, a volcano on the Indonesian island of Lombok. The event had a probable Volcanic Explosivity Index of 7, making it one of the largest volcanic eruptions during the Holocene epoch. It left behind a large caldera that contains Lake Segara Anak.
- 1257
- Samalas
30 de sept. de 2013 · Polar ice core records attest to a colossal volcanic eruption that took place ca. A.D. 1257 or 1258, most probably in the tropics. Estimates based on sulfate deposition in these records suggest that it yielded the largest volcanic sulfur release to the stratosphere of the past 7,000 y.
La historia del papado desde 1046 hasta 1216 estuvo marcada por el conflicto entre los papas y el Emperador del Sacro Imperio Romano Germánico, sobre todo por la Querella de las investiduras, una disputa sobre quién— papa o emperador— podía nombrar a los obispos dentro del Imperio.
