Palácio da Bolsa is the name of this stop, and its visitor timetable changes with the season. From November through March, it opens every day in two parts: 09:00 to 12:30, then 14:00 to 17:30. That midday closure is worth remembering if you are planning an interior visit later today.
Between April and October, the daily opening becomes one longer period, from 09:00 to 18:30. It is closed on 25 December and on 1 January. While you are safely still on the pavement, notice the decorative surfaces and the way the building presents itself to the street.
The useful practical detail here is simple: the colder-season schedule requires working around the afternoon reopening, while the April-to-October hours allow more flexibility. Palácio da Bolsa is open daily throughout each stated seasonal period, apart from those two holiday closures. If you intend to enter, choose a time that fits the season’s schedule rather than assuming the same hours apply all year.