How did the masses of workers who built the great infrastructures and public buildings in Macau during the Portuguese rule impact their conception and construction? How were the long-distance relations between central institutions based in Portugal (e.g. the Colonial Urbanisation Office) and the Macanese Public Works Office managed, since the latter was also strongly influenced by Chinese and Hong Kong technicians? Research about the colonial public works (CPW) in Macau, particularly crossing the 20th century, is still scarce and little is known about its labour management and operations. How and to what extent was it different from other former colonial territories? Studies on technical and conceptual knowledge transfers between experts from Macau, Portugal, Hong Kong and China remain scarce.