Robes thumb|left|Lord Mayor Arthur wearing the state robe over court dress As an alderman of the City of London the lord mayor has a scarlet gown and a violet gown, which are identical to those worn by their fellow aldermen except that they are trained. The violet robe is worn at most formal meetings of the Corporation with the scarlet robe substituted on certain days or occasions as directed by the City Ceremonial Book.
Robes thumb|left|Lord Mayor Arthur wearing the state robe over court dress As an alderman of the City of London the lord mayor has a scarlet gown and a violet gown, which are identical to those worn by their fellow aldermen except that they are trained The violet robe is worn at most formal meetings of the Corporation with the scarlet robe substituted on certain days or occasions as directed by the City Ceremonial Book.