Historical monuments that were built by the Portuguese in Kenya.

1. Fort Jesus in Mombasa - Built in the 16th century by the Portuguese, Fort Jesus is a UNESCO World Heritage Site and one of the most well-preserved examples of Portuguese military architecture in East Africa.

2. Vasco da Gama Pillar in Malindi - Erected in 1498 by the Portuguese explorer Vasco da Gama to mark his arrival in Malindi, this pillar is one of the oldest European monuments in Africa.

3. Gede Ruins in Malindi - The Gede Ruins are the remains of a Swahili town that was occupied by the Portuguese in the 16th century. The ruins include a mosque, a palace, and several houses.

4. Lamu Fort in Lamu - Built by the Portuguese in the 16th century, Lamu Fort is one of the oldest and best-preserved forts in Kenya. It now houses a museum showcasing the history of Lamu.

5. Takwa Ruins in Lamu - The Takwa Ruins are the remains of a Swahili town that was abandoned in the 17th century after being attacked by the Portuguese. The ruins include a mosque, houses, and a palace.

There are no known historical monuments that were built by the Portuguese in Kenya. The Portuguese presence in Kenya was primarily limited to the coastal area, where they established trading posts and forts. These structures were mostly temporary and not intended to be permanent monuments.