It was the first opera sung entirely in Italian by Italian singers to be performed in London .
On 9 April 1705 , the Queen 's Theatre in London was officially opened with Greber 's opera Gli amori di Ergasto ( The Loves of Ergasto ) .
Queen 's Theatre in London was the first opera sung entirely in Italian by Italian singers to be performed in Queen 's Theatre in London .
On 9 April 1705 , the Queen 's Theatre in London was officially opened with Greber 's opera Gli amori di Ergasto ( The Loves of Ergasto ) .