The Prince of Wales and Duchess of Cornwall will visit townships and community projects during a tour of Tanzania and South Africa next month.
The trip, which will focus on the environment and sustainability, education and trade, is timed to take place just a month before the Durban Climate Summit.
In Tanzania, the official visit will be part of the celebrations of the 50th anniversary of independence from the UK..They will visit a Masai village, a national park and Zanzibar.They will meet President Jakaya Kitwete at his residence in the country's capital, Dar es Salaam.
The duchess will make visits to child literacy programmes in both countries.
Prince Charles has recently become president of World Wildlife Fund (WWF) in the UK, and in both Commonwealth countries there will be a strong focus on the charity's work to protect endangered species and fragile ecosystems