sonatas showcase a range of musical styles: some are exemplary of a Baroque toccata; some are firmly in the galant style; some are clearly influenced by the German Empfindsamer Stil (literally 'sensitive style'). Despite rarely, if ever, traveling outside of Lisbon, his work also includes various geographical styles, such as the German Mannheim school, the French minuet, and the Italian style as composed by Scarlatti, his colleague and contemporary. Santiago Kastner, Seixas' biographer and editor of his pieces, describes Seixas' works as "unoccupied" with a particular form, and given over to frequent improvisation. Much of his work was destroyed in the earthquake that devastated Lisbon in 1755. Only three orchestral pieces and around one hundred keyboard sonatas out of over an alleged seven hundred survived, plus a handful of choral works for liturgical use (much more conservative than what one would expect from his instrumental music). Macario Santiago Kastner published collections of the sonatas in Portugaliae Musica. Choral works Mass in G. Tantum ergo; Ardebat vincentius; Conceptio gloriosa; Gloriosa virginis Mariae; Hodie mobis caelorum; Sicut cedrus; Verbum caro; Dythyrambus in honorem et laudem Div. Antonii Olissiponensis. Instrumental works Overture in D; Harpsichord Concerto in A major; Harpsichord Concerto in G minor; Symphony in B flat; Harpsichord and organ sonatas and toccatas. Selected recordings Amon Ra CD-SAR 43 Harpsichord Sonatas played by Robert Woolley on a harpsichord made by Joaquim José Antunes in Portugal in 1785. The instrument is in the Finchcocks collection, Goudhurst, Kent, United Kingdom. The recording was made at Finchcocks in December 1988. Deutsche Grammophon 453-182. Two motets (Ardebat Vincentius and Tantum Ergo), in a two-disc collection also containing sacred music by Sousa Carvalho, António Teixeira, and F. A. de Almeida. Originally recorded in 1970, with the Gulbenkian Chamber Orchestra and Chorus conducted by Pierre Salzman and Michel Corboz. Stradivarius STR 33544 Keyboard Sonatas played by Bernard Brauchli on a copy of a clavichord after Manuel Carmo, Porto 1796. The recording was made in Switzerland in December 1998. Virgin Veritas 45114 Harpsichord Concerto, etc. played by Norwegian Baroque Orchestra - Ketil Haugsand. Virgin Veritas 45115 Missa Dixit Dominus, etc. played by Camara de Lisboa / Norwegian Baroque Orchestra - Ketil Haugsand. Portugaler 20102 SPA Música Sacra, Segréis de Lisboa, Coral Lisboa Cantat, Manuel Morais dir. Vox PVT 7171 Minuet and Toccata (Largo-Allegro) played by Elena Polanska Fandango - Scarlatti in Iberia - 6 sonatas played by Sophie Yates-