The Bremish GT4 is a GT4 type tramcar that was built in two main versions from 1959 to the 1980s. In the 1950s and 1960s, the Bremish tram company Bremer Straßenbahn, like many other German tram companies, changed old two-axle tramcars for modern ones on bogies. The cars could be longer, if they were articulated. In Bremen, like at the same time in Stuttgart, articulated cars on only two bogies were constructed by the local manufacturer Hansa Waggonbau. The articulation was controlled by transmission shafts. All the Bremish cars were designed for unidirectional traffic (doors only on the right side), so that they required loops on the ends of their courses.