Æthelred was king of Mercia from 675 until 704. He was the son of Penda of Mercia and came to the throne in 675, when his brother, Wulfhere of Mercia, died from an illness. Within a year of his accession he invaded Kent, where his armies destroyed the city of Rochester. In 679 he defeated his brother-in-law, Ecgfrith of Northumbria, at the Battle of the Trent: the battle was a major setback for the Northumbrians, and effectively ended their military involvement in English affairs south of the Humber. It also permanently returned the Kingdom of Lindsey to Mercia's possession. However, Æthelred was unable to re-establish his predecessors' domination of southern Britain.
Stained glass window in St John's Chester
Penda was a 7th-century king of Mercia, the Anglo-Saxon kingdom in what is today the Midlands. A pagan at a time when Christianity was taking hold in many of the Anglo-Saxon kingdoms, Penda took over the Severn Valley in 628 following the Battle of Cirencester before participating in the defeat of the powerful Northumbrian king Edwin at the Battle of Hatfield Chase in 633.
Stained glass window, depicting the death of Penda at the Battle of the Winwaed, Worcester Cathedral
