The Italian opera stages in London - the King’s Theater and the Her Majesty’s Theater and from 1847 the Royal Italian Opera House Covent Garden - functioned as the most important market in the international opera world in the 19th century. The mainstays of this system were international singer stars like Jenny Lind, who achieved lucrative income from the high London fees. The book analyzes aspects of singing in the English capital from 1806 to 1867. and characterizes the London opera system and its protagonists. Particular attention is paid to factors such as the composition of the London opera audience, the drafting of singing contracts and the usual practice of adapting and inserting aria.