The German Colonial Period; Public buildings are solid and impressive making their presence felt wherever they stand. The Germans developed a special colonial architecture for tropical areas that included elements of Arabic design from places like Zanzibar, and made maximum use of local materials such as coral stone, mangroves, timber, sand and stones, and decorating the buildings with intricate arches, mosaics, elaborate masonry and wood craftsmanship.
The British Colonial Period; Building were mostly erected after the Second World War and based on architectural designs of that period. Examples are the library, Katani House and others, built by commercial companies such as banks and agro-industrial firms, or by philanthropists who had become wealthy from the booming sisal industry. As Tanganyika was not a full colony, Britain did not invest as much as Germany in infrastructure and public buildings.