Leitmotivs in Puccini's Tosca
Analyzed roughly in order of appearance.
The start of the whole darn opera. Bombastic horns playing a giant tritone in the bass to indicate with the "devil's interval" that This Is The Villain, pretty sick way to begin a show. I'm leaving out all the versions with fun flourishes that occur once Scarpia enters the stage, for the sake of simplicity because this Leitmotiv is all over this score, but god, do I love those, too!
Angelotti frantically on the run...
... and Angelotti anxiously in hiding. (This is the loud version where Angelotti reveals himself to Cavaradossi, but there's a quieter, pizzicato version, too, when he retreats back into the Cappella Attavanti.)
Curiously, both of these themes appear when Tosca is raging over the fact that Cavaradossi has painted the Marchesa Attavanti, so, make of that what you will... maybe the Angelotti siblings kinda blurred together in Puccini's mind?
The cheeriest little tune! It accompanies every one of the Sacristan's entrances and exits, even after Scarpia turns up.
A fabulous, heroic theme for a fabulous, heroic character. This plays when Cavaradossi first unveils his portrait of the Marchesa Attavanti, then again when he and Angelotti are discussing the Marchesa's role in Angelotti's escape plans, then again right after Scarpia discovers the Marchesa's portrait and asks who painted it. (Did I think it was actually a Leitmotiv for the Marchesa Attavanti for a while? Absolutely, until I saw the error of my ways, which I should have done far sooner, because this theme literally accompanies the first mention of Cavaradossi's name in the opera.) It also appears when Spoletta is pouting at the start of Act 2 over the fact that Cavaradossi wouldn't give up Angelotti's location when confronted at his villa. Most notably, though, this theme plays under all those trumpets right before Cavaradossi goes on his "Vittoria!" spree in Act 2.
I know, she doesn't even appear onstage, weird that she gets her own Leitmotiv, I don't make the rules. This line from "Recondita armonia" is probably a more accurate theme for the Marchesa Attavanti, with the above iteration from the end of the aria, although it also reappears when Scarpia is looking at the portrait and recognizes the Marchesa, and when Scarpia lies to Tosca about where he found the fan.
This is from Tosca's first entrance, but the same theme also forms the melodic basis of "Qual'occhio al mondo" a few minutes later (savvy move to placate your girlfriend's jealousy by singing her own Leitmotiv at her!). It's all over Act 2, as well, both when Scarpia is thinking about Tosca, and then when she actually enters the stage. And, notably, this theme forms the accompanying line of "Vissi d'arte."
Also a moment of appreciation for how this little figure from the end of the above entrance music appears during and after "Non la sospiri, la nostra casetta" ... and then again as part of the melodic line of "Vissi d'arte," both at "diedi fiori agli altare" (appropriate, since we first hear it when Tosca is actively leaving those flowers at the altar!) and in modified form at the big climactic "perché, perché Signor."
Obviously sung by Mario and Floria together in the second half of their lengthy in-church flirtations in Act 1, but also appears when Floria comes looking for Mario at the end of the act, and again when she departs in a state of despondency over a fan. It also pops up again at the start of Act 2, when Scarpia reflects on the fact that Tosca will come to him out of love for her Mario. It doesn't *quite* appear at the beginning of Act 3, although it certainly feels like it's creeping its way in amongst all those Roman bells... but it comes back in real style with that gorgeous cello rendition while Cavaradossi is writing that letter to Tosca from prison, and then again when Tosca herself enters after "E lucevan le stelle"!
A piano reduction can't create the full haunting impression that all those hollow-sounding woodwinds create, but I totally love that the well in the garden of Cavaradossi's villa gets its very own little Leitmotiv. 🥰 Recurs in very aggressive format in Act 2, when Scarpia is interrogating Cavaradossi about Angelotti's whereabouts, and then again when Tosca spills the beans, and finally when Scarpia loudly sends Spoletta out to the well to arrest Angelotti.
(Interestingly, a variant of this theme also appears towards the end of Act 2, when Angelotti is already dead, and Scarpia and Spoletta are hatching evil schemes revolving around a mutual understanding of what happened to Conte Palmieri... so maybe this theme applies more broadly to sad republicans trapped in unpleasant Scarpia-related fates?)
I actually stole this nomenclature from something I was reading about this opera, and it makes sense, since this music plays when Scarpia is examining the Marchesa Attavanti's fan, as well as when Tosca gets to the "Dove son?" bit of her imagining Cavaradossi's hypothetical affair with the Marchesa Attavanti (alongside Angelotti's actual theme—even more confusion between the Angelotti sibs!), and it's interwoven into all of Scarpia's fantasies at the top of Act 2 about capturing and executing Angelotti and Cavaradossi. That said, I low-key think of it as the "Castel Sant'Angelo Theme" because I challenge you to so much as look at that monument without singing "fuggì pur ora da Castel Sant'Angelo" to yourself to the tune in the bass line here...
Maybe better described as Scarpia's "lounging about the Palazzo Farnese while thinking evil thoughts" theme, but it recurs frequently at the start of Act 2, intermixed with other Leitmotivs (e.g., the Castel Sant'Angelo theme, the love theme, Tosca's theme, obviously Scarpia's theme), until Spoletta turns up to report the news.
This feels like it lives alongside that other theme, in terms of being Scarpia's "lounging about the Palazzo Farnese while thinking evil thoughts but simultaneously pretending to be nice to Tosca" music, given it comes up pre-torture scene, and then post-"Vittoria!" scene.
Questioning Cavaradossi, with the cantata occurring in the background... this comes back when Cavaradossi's body is dragged back onstage post-torture, before he regains consciousness to Tosca's theme.
This really feels to me like the music that sets up the dynamic between Tosca and Scarpia throughout this act. It plays when Tosca is left with Scarpia for questioning, and then later when Tosca anxiously questions Mario while he's offstage being tortured.
Straight-up torture and stuff.
I kinda love how Scarpia's charging ahead with the torture theme in elongated form here, while Tosca's line introduces that little triplet-filled melodic gesture that turns up later in the orchestrations as a theme for Tosca's suffering throughout Act 2. Said gesture comes back after all the "Vittoria!" business, when Tosca is screaming as Scarpia's goons are dragging Cavaradossi off to prison; and then when Tosca threatens to throw herself out a window rather than let herself be ravished by Scarpia (foreshadowing!); and then when she's screaming for help right before her big aria; and finally—and most memorably—at the climax of "Vissi d'arte."
Getting Screwed by Scarpia:
I once heard a lecture in which the speaker pointed out that the A-C theme heard throughout this section—during which Tosca usually nods her assent to Scarpia's bargain—is actually a terrible musical pun. Those two notes in Italian would be signified as "la do," which also means "I'm giving it to you," which... yeah, in context, yikes. Notably, that same minor-third figure returns during Cavaradossi's execution, and then in the really violent chords right before Spoletta and Tosca's final exchange at the very end of the opera, so. Similar sentiment of getting screwed by Scarpia, living or dead?
"We Should Totally Just Stab Scarpia!":
Well, I mean, this is the music from just before and just after all the stabbing actually occurs—so, when Tosca is contemplating stabbing him and then reconciling herself to the fact that she just has, but. Close enough? I love how this theme then collapses into Tosca's theme as she goes and fetches some candelabras and a crucifix, followed by a bunch of slow, menacing iterations of Scarpia's Leitmotiv (dude gets to be scary even in death!). And of course it comes back in Act 3, when Tosca is doing her quick little recap of the second half of Act 2 for Mario.
It may totally be cheating to just say that "E lucevan le stelle" is the big Leitmotiv of doomed love for this couple, but, as @soubrettefloriatosca pointed out in a comment on a longer ramble that I wrote about this particular aria, the fact that it's reprised as Tosca leaps to her death can be read as indicating that she's keeping her love for Mario in her thoughts in this final moment, even as her final words are to Scarpia. So I'll make the argument for it, and y'all are more than welcome to counter-propose in comments.