Preludes and Fugues1-ⅩⅡ Preludes and Fugues1-ⅩⅢ Preludes and Fugues ⅩⅢ-ⅩⅩⅣ Preludes and Fugues ⅩⅣⅩⅩⅣ 3 preludes and fugues, op.36 24 preludes and fugues Preludes and fugues, Op. 87 Preludes and Fugues, Op.87 Preludes and fugues BWV 846-857 Preludes and fugues BWV 858-869