The word andenken, as the German equivalent of souvenir, appears only twice among letters and documents associated with the Mozarts, and only once in a document deriving from Mozart’s his lifetime, Leopold Mozart’s letter to his wife from Rome of 14 April 1770:
Fortunately we got a decent supper and slept well in Viterbo. While there we saw St Rosa of Viterbo who |: like St Catherine of Bologna in Bologna:| can be seen in a perfectly preserved state. From the former we took away an ague powder and some relics as a souvenir, from the latter a belt.
- He had to give a souvenir of his work to every composer, painter, engraver and the like we met on our travels. . .
Since the word andenken was closely bound up with the notion of souvenir, and Leopold himself establishes a linguistic connection between the material object (the manuscript) and the immaterial object (the music), both the acquisition of relics and the giving of music autographs is an act of invoking a (future) memory and, following the eighteenth-century understanding of souvenir, of evoking feelings. These acts of memory and feeling inform music of various sorts: texted music, untexted music specifically composed for occasions or institutions intended to evoke memory and feelings, and in untexted music.
Among Mozart’s texted works, the word souvenir does not occur, only the word andenken, in the libretto to Der Schauspieldirektor K486:
- Madame Krone: 'O es ist eine feierliche
Nacht, Bonaventuri, diese heutige Nacht! – Nicht sowohl ihrer selbst willen –
sie müsst es denn noch werden – als vielmehr ihres Andenkens halber.'
But it is also implicit, if not explicit, in arias about memory loss and memory, as in the Countess’s aria ‘Dove sono’ from Le nozze di Figaro:
- Where are the lovely moments of sweetness and pleasure? Where have he promises gone that cam from those lying lips? [listen here]
Some untexted works, because of the institutions for which they were commissioned or composed, have explicit associations with memory, and in particular memory of loss, conjuring expressions of regret or sadness. These include the Masonic Mourning Music K477 and the music composed for the mausoleum dedicated to Field Marshall Ernst Gideon von Laudon, hero of the Siege of Begrade.
Considering the material and immaterial nature of souvenir, the Mozarts’ explicit association between memory and musical objects (as in their gift of God is our Refuge K20 to the British Museum), and texted and untexted works composed for specific occasions that evoke memory, it is worth asking to what extent instrumental music not associated with any external event might similarly evoke or represent the notion of souvenir, including both memory and expression. Among numerous passages that might be understood this way, the first movement of the string quartet K590, composed in June 1790, is perhaps the most substantial. It invokes memory, and presence and absence, as a means to evoke expression.
 'zum guten glücke haben wir in Viterbo noch gut zu nachtgespeiset und wohlgeschlafen. alda sahen wir die hl: Rosa von Viterbo, die |: so wie die hl: Catharina di Bologna in Bologna :| unverwesen zu sehen sind. von der ersten haben wir fieberpulver und Reliquien, von der zweyten eine gürtl zum angedenken mitgenommen.'
 'Jeder Kompositeur, Mahler, Kupferstcher u. dgl., den wir auf unsern Reisen kennen lernten, mußte ihm von seiner Arbeit ein Angedenken geben. . .'
 Dove sono i bei momenti / Di dolcezza e di piacer? / Dove andaro i giuramenti / Di quel labbro menzogner?