Metro Line M4 (Budapest Metro) Metro Line M4 (Budapest Metro) Line 4 (officially: South Buda–Rákospalota (DBR) Line, Metro 4 or M4, and unofficially: Green Line), is the fourth line of the Budapest Metro. It opened on 28 March 2014. The first section, 7.4 km in length and consisting of ten stations, connects the southwestern Kelenföld vasútállomás located in Buda, and the eastern Keleti pályaudvar in Pest, under the River Danube. While three additional sections — one an eastern extension to Bosnyák tér, the second west to Virágpiac, and a third further east to Újpalota — have been planned, these remain unfunded by the Budapest city
Budapest styles Budapest represents on the entire timeline. Start with the Roman City of Aquincum represents the ancient architecture. The next determinative style is the Gothic architecture in Budapest. The few remaining ones can be found in the Castle District. Buildings to look for are no. 18, 20 and 22 on Országház Street, which date back to the 14th century and No. 31 Úri Street, which has a Gothic façade that dates back to the 15th century. Another building with Gothic remains is the Inner City Parish Church (Budapest), built in the 12th century. The most characteristic Gothic-style buildings are actually