Fronteira Palace is covered in tiles that carry the subject of each room rather than a pattern round the edges. The Battle Room is lined with panels of the war just ended, fought to take the crown back from Spain, painted in purple and blue with the marquis himself in the middle of the fighting. Outside, a formal garden runs down to a rectangular water tank. Above the water stands the Gallery of the Kings: busts of Portuguese monarchs in niches, and below them fourteen life-size tiled horsemen doubled in the reflection.
Elsewhere there are monkeys playing instruments, cats, a grotto room, and benches tiled with animals. This is the largest set of seventeenth-century tiles still in the place they were made for, and they survive because the family never had to sell the house. João Mascarenhas, first Marquis of Fronteira, had the place built in 1671 and 1672 as a hunting pavilion outside the city, and his descendants have never left. It became the family's main house only later.