Wednesday morning in late October
The sweet spot for this route is a mid-week morning in late October or early November. The Mezquita is at roughly half its summer capacity, the Judería lanes are navigable without stopping every 20 metres, and the October light at 10am turns the caliphal stonework a particular amber that no photograph ever quite captures. Avoid any weekend in April during the Patio Festival — the centro fills wall-to-wall.