Frans Brüggen conducted the Orkest van de Achttiende Eeuw in a Mozart/Haydn program, at Rotterdam Doelen.
Pictures are not my best, but give a good visual impression from a place well fit for the audio part !!
Performed was (a.o) the Theatrical Music Egmont, opus 84. Normally only te ouverture is performed. Soprano was the Australian Rebecca Nash:
Rebecca Nash made her debut with Opera Australia singing Countess Almaviva and her debut with Scottish Opera as Cio-Cio San. Last season she made her debut with the Royal Opera House, Covent Garden in both Jenufa under Bernard Haitink and Daphne under Stefan Soltez and her debut with the Scottish Chamber Orchestra in Beethoven's Egmont under Frans Bruggen. This season she makes her debut at the BBC Proms ("Elijah" under Kurt Masur), sings Beethoven's 9th Symphony in Japan under Frans Bruggen and returned to the Royal Opera for Elektra under Semyon Bychkov and to the BBC Proms for Elektra under Donald Runnicles. She will tour Spain and the Netherlands with Frans Bruggen in Beethoven's Egmont.

(taken from -- http://www.askonasholt.co.uk/Green/Green/Home.nsf/Lookup5a/Rebecca+Nash?OpenDocument )