A chimere is a garment that was formally worn as part of academic dress, or by Anglican bishops in choir dress.
A descendant of a riding cloak, the chimere resembles an academic gown but without sleeves, and is usually made of scarlet or black cloth. In modern English use the garment is worn as part of the ceremonial dress of Anglican bishops. It is a long sleeveless gown, open down the front, gathered in at the back between the shoulders, and with slits for the arms. It is worn over the rochet, colored either black or scarlet (a combination referred to as "convocation robes").
In the Anglican Church the rochet is a vestment peculiar to bishops, and is worn by them in choir dress, with the chimere, both at all times of their ministration in church and also on ceremonial occasions outside, e.g. sitting in the House of Lords, attending a royal levee, or commencement ceremony. It may be worn with a stole, cope and mitre for more dignified occasions (such as Baptism outside the context of the Eucharist, Solemn Evensong, royal weddings and the coronation of the Sovereign).