All just my personal opinion
Blog post #493 — Concert review, ★★★½, Quatuor Hermès @ St.Peter, Zurich, 2019-05-12 — Cherubini: String Quartet No.1 in E♭ major; Beethoven: String Quartet No.4 in C minor, op.18/4; Schubert: String Quartet No.13 in A minor, D.804, “Rosamunde”
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Blog post #471 — Concert review, ★★★★, Michael Gläser, Zürcher Sing-Akademie @ St.Peter, Zurich, 2019-02-10 — Bach: Motet “Singet dem Herrn”, BWV 225; Prelude & Fugue in E♭ major, BWV 552; Rheinberger: Mass in E♭ major for double choir, op.109, “Cantus Missae”; Brahms: Fest und Gedenksprüche, op.109; Bruckner: Motet “Ave Maria”, WAB 6; Bruckner: Motet “Locus iste”, WAB 23
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Concert review, Aris Quartett @ St.Peter, Zurich, 2018-10-28 — Mendelssohn: String Quartet No.2 in A minor, op.13; Dvořák: String Quartet No.13 in G major, op.106, B.192
Concert review, Stradivari Quartett @ St.Peter, Zurich, 2018-09-09 — Mozart: String Quartet No.21 in D major, K.575, “Prussian”; Schubert: String Quartet Movement (“Quartettsatz) in C minor, D.103; Schumann: String Quartet No.1 in A minor, op.41/1
Concert review, Armida Quartet @ St.Peter, Zurich, 2018-07-08 — Bach: The Art of the Fugue, BWV 1080; Mozart: Adagio and Fugue in C minor, K.546; Beethoven: String Quartet in B♭ major, op.130 / Great Fugue in B♭ major, op.133
Concert review, Chiaroscuro Quartet @ Church St.Peter, Zurich, 2018-05-27 — Bach: The Art of Fugue, BWV 1080; Beethoven: String Quartet No.2 in G major, op.18/2; Mendelssohn: String Quartet No.1 in E♭ major, op.12