Centro storico from Piazza Duomo north up Via Etnea to Villa Bellini. Most of what we'd want is in a 1.5km strip.
Trattoria del Cavaliere has Pasta alla Norma at €6.50 since 1922. Antica Marina is inside the Pescheria with an all-Etna wine list. Razmataz is the natural-wine 40-somethings move.
In Catania, arancino is masculine and conical (mimicking Etna). Pasticceria Savia (1897) is the top all-rounder.
Bohème Mixology is in "World's Best Bars" conversations. Etnea Roof Bar is the sunset Etna view in town.
The Benedictine Monastery (one of Europe's largest) has guided tours in English with air-conditioned interiors — strong fit for the seniors. Via dei Crociferi is the slow-walk UNESCO church-hop.
Eastern Sicily (Catania, Syracuse, Messina) = arancino (masculine, plural arancini); Western Sicily (Palermo, Trapani) = arancina (feminine, plural arancine). Same word origin from "arancia" (orange). Palermo = round, Catania = conical (mimicking Etna). Classic fillings: ragu (meat + tomato + peas), butter (ham + mozzarella). Catania pushes pistachio and squid-ink. Best on this trip: Savia or Serafino in Catania.
Pasta alla Norma: the canonical Catania dish — pasta with tomato, fried eggplant, salted ricotta, basil. Named for Bellini's opera. De Fiore (Nuova Trattoria del Forestiero) is what TasteAtlas cites as "the original recipe"; Trattoria del Cavaliere is the workhorse value version.
Pescheria warning: watch your bag, watch your step (wet floors, fish guts), and stay out of the way of vendors moving heavy crates. Closes at noon. If we're going for the big-finish Ortigia dinner Saturday night, fuel up the van at the Catania-area station on the way back — saves time before the 9 AM Sicily by Car return Sunday.