Artes Decorativas Museum is just one of the attractions in Lisbon City Center, Santa Maria Maior so you might want to stop by during your trip. It's also full of great shops and restaurants, so you can spend the afternoon having a wander. If you want to experience more of the culture Santa Maria Maior has to offer, head to Miradouro de Santa Luzia, Portas do Sol Viewpoint, and Fado Museum.