La Muralla Roja (The Red Wall) is a post‑modern apartment complex perched on the cliffs of Calpe, on Spain’s Costa Blanca. Designed by renowned Catalan architect Ricardo Bofill and completed in 1973, the building mimics a fortress-citadel inspired by North African kasbahs and Arab Mediterranean architecture .

The layout is based on an interlocking grid of Greek‑cross modules (5 m arms) forming a labyrinth of patios, stairways, terraces, bridges, and courtyards, serving a total of 50 apartments—studios (~60 m²), two-bedroom (~80 m²), and three-bedroom (~120 m²)—with amenities including rooftop solariums, a pool, sauna, ground-floor stores and a restaurant.