 Trajan akakunda Dacia inenge Romania yemazuva ano neMoldova, uye akakunda mambo Decebalus, uyo akanga akunda mauto aDomitian. Muhondo Yokutanga yeDacia101102, Dacia yakakundwa yakava umambo hwevatengi; muHondo yechipiri yeDacian 105106, Trajan akaparadza zvachose kuramba kwevavengi uye akabatanidza Dacia kuHumambo. Trajan akabatanidzawo nyika yeNabatea kuti aumbe dunhu reArabia Petraea, raisanganisira nyika dzokumaodzanyemba kweSiriya uye kuchamhembe kwakadziva kumadokero kweArabia. Akagadzira zvivako zvakawanda zvichiripo nanhasi, zvakadai seTrajans Forum, Trajans Market uye Trajans Column. Mugadziri wake mukuru akanga ari Apollodorus weDhamasiko; Apollodorus akaita chirongwa cheForamu neChikamu, uyewo akagadziridza Pantheon. Zvivako zvaTrajan zvinoratidza kukunda muAncona neBeneventum zvimwe zvaakavaka. MuHondo yechipiri yeDacia, Apollodorus akavakira Trajan zambuko guru pamusoro peDanube. 