Cities, like people, carry their years not as burdens but as stories — and Riga, turning 825, has chosen to tell its story all at once, across every neighborhood, in every register from medieval cobblestone to Formula 1 exhaust. This weekend, the Latvian capital opens itself as both museum and carnival, inviting its residents to move freely through eight centuries of accumulated identity. The celebration is less a single event than a city becoming briefly, fully conscious of itself.