Repainted in much more bright colours: Gate Church of St John the Baptist which is now technicolor

Mouse Tower in Bingen and the Pfalzgrafenstein Castle, both were recently painted in white with red elements
See de.wikipedia.org

Tartu Observatory in Estonia: from bright yellow to white

The Eiffel Tower has had many colours over the years, from red in 1889 to yellow to the current brownish.
See www.leparisien.fr

the site with Buddhas remains and footprint was terra cotta in the past and is now white

Melaka: Originally, the Stadhuys like the other Dutch administrative buildings in South East Asia was painted white. However, after Melaka was handed over to the British, it was re-painted terra cotta by the British in 1911.