Life
Medericus, Mederic or Merri, was born in Autun, France and as a particularly virtuous child, was placed in a Benedictine monastery by his parents at the age of 13. The monastery consisted of fifty-four monks who lived lives of humility, meekness, charity, obedience and observance of the Rule and in this company he was eventually chosen as abbot, although against his will. He preached by example of prayer and penance, and his reputation spread throughout the country.
He was always aware of the temptation to become prideful and as he became popular among both monks and lay people, he fled to the forest where he lived as a hermit for several years. He spent his time in contemplation, prayer and penitential manual labour. His retreat eventually became public, so he was obliged to return to the monastery, and continued his work strengthening and edifying his brethren.
In later life he led a pilgrimage to the shrine of St Germanus in Paris. He remained in Paris, living in a cell next to a chapel dedicated to St Peter. He died in the cell following three years of illness in 700 C.E.
St Medericus, also known as St Mederic or St Merri is considered the patron saint of the right bank of the River Seine in central Paris.
References
https://en.wikipedia.org/wiki/Mederic_(monk)
https://www.bartleby.com/210/8/294.
html https://dbpedia.org/page/Mederic_(monk)