Organ concert series, four organ concerts in the Oosterkerk in Amsterdam by Henk Verhoef with music by, among others, Buxtehude, Bach, Haydn and Brahms. The organ of the Oosterkerk was built by Petrus van Oeckelen in 1871, for the Nieuwezijds Chapel. When it was closed in 1899, it was moved to the Oosterkerk. The Flentrop firm restored it in 2002. The large disposition and the refined intonation make the organ of the Oosterkerk a grateful instrument for music from all kinds of style periods.