The Castello Sforzesco is a 15th-century ducal fortress containing 12 museums, 2 masterpieces by Michelangelo and Leonardo, and the most absurd museum deal in Italy: €5 for EVERYTHING. The Sforza dukes built it. Leonardo designed its defenses. Napoleon demolished parts of it. The city rebuilt it. Today it houses: the Pietà Rondanini (Michelangelo's LAST sculpture, unfinished at his death at 88 — he was working on it 6 days before he died), the Sala delle Asse (Leonardo painted the ceiling as interlocking tree branches forming a green vault — restored 2019), an Egyptian museum, a musical instruments collection, armor, applied arts, and 7 more collections. All for €5. Milan museums →
Michelangelo — Pietà Rondanini (1552-1564). Museo della Pietà Rondanini (dedicated room, ground floor). His LAST work — he was carving it 6 days before his death at 88. It's unfinished: Christ's body emerging from the marble, Mary supporting him from behind, the forms merging, the boundaries between the two figures dissolving. Where the Borghese Pietà (1499) is technically perfect, the Rondanini is spiritually transcendent — 65 years of artistic evolution between first and last, polished mastery to raw abstraction. Leonardo — Sala delle Asse (1498). Room at the northeast tower. Leonardo painted the ceiling and upper walls as a forest canopy — mulberry tree trunks climbing the walls, branches interlocking across the vault, forming a green architectural framework. Restored 2019 — the green and gold are vivid again after 500 years.
Museo d'Arte Antica: Medieval and Renaissance sculpture (Bambaia's monuments, Gothic tracery). Pinacoteca: Mantegna, Bellini, Canaletto, Tiepolo. Museo Egizio: Small but quality Egyptian collection. Museo degli Strumenti Musicali: 700+ instruments including Stradivarius violins. Museo delle Arti Decorative: Furniture, ceramics, glass. The courtyard: Free to enter — Renaissance arches, the Filarete tower (rebuilt), and the entrance to Parco Sempione (Milan's Central Park — the Arch of Peace at the far end, Triennale design museum inside).
Piazza Castello. €5 all museums. Open Tue-Sun 10am-5:30pm. Duration: 1.5-3h (depending on how many museums you explore). Metro M1 Cairoli (2 min walk). Courtyard: free, open daily. Combine: Castello Sforzesco → Parco Sempione walk → Triennale Design Museum (€15) → Arco della Pace → aperitivo in the park. Or: Castello morning → Last Supper afternoon (10 min walk).