Berlin is the capital city of Germany. It’s situated in northeastern Germany. Berlin is among the oldest of the world’s great cities and one of the most cosmopolitan. It is the country’s political, cultural, and scientific centre. Since the Middle Ages, Berlin is renowned for influencing other cities around the world. It is famous for its unique combination of grit and glamour, with astounding medieval buildings and modern structures that stand side by side to complement each other. Some of the places that make it famous include the amazing ancient buildings, Brandenburg Gate, Alexanderplatz, Museum Island, Berlin Wall Memorial, and the Reichstag building.

The German census is done after every 10 years and 2011 was the last time that it was conducted. The next census is scheduled for 2021 in Germany. According to the 2011 census, Berlin had a population of 3.5 million. Compared to other cities in Germany, Berlin is considered to be more diverse. According to the 2011 census, 70.6% of the population is of German origin. When it comes to religious beliefs, Berlin is known to be diverse as most people identify themselves as Christian, Muslim, and other religions. According to the data collected during the 2011 census, 45.9% people in Berlin identified themselves as Christian, 8.1% as Muslim, and 0.9% other religions. On the other hand, 45.1% of respondents declared that they followed no religion. As one of the most diverse cities in the world, Berlin houses over 3.7 million residents, who collectively speak over 100 languages, including Turkish, Russian, Arabic, Polish, Kurdish, Vietnamese, English, Spanish, French, and of course German. Berlin is also renowned for its festivals, diverse architecture, nightlife, contemporary arts, and a high quality of living.

Berlin is governed by the Senate of Berlin, which is the executive body and simultaneously the upper house of Berlin's state parliament. The Senate of Berlin is made up of the Governing Mayor and up to eight senators appointed by the Governing Mayor, two of whom are appointed (deputy) mayors. The Berlin State Office for Health and Social Affairs is responsible for the public health system, social services, and social security in the city. The 12 boroughs of Berlin, which are administrative units within the city, are each governed by a borough council and a borough mayor.

Berlin has a diverse economy, with the service sector contributing around 80% of its total GDP. The city is a significant hub of start-ups, technology, and innovation, and it enjoys the status of being one of the most vibrant economic cities in Europe. It has a GDP of over €124 billion, which is about 4% of Germany's total GDP. The size of its economy is larger than that of several European nations. The Port of Berlin handles 21.1 million tons of cargo every year.

Berlin has a comprehensive plan for its infrastructure under the Berlin Strategy 2030. The plan identifies a range of infrastructure priorities for Berlin, from new energy, water and sewerage infrastructure, to enhanced digital connectivity and new rail and road schemes. Some of the investment is provided by the private sector, through the privatized utilities. This has generally worked well in Berlin, although business is particularly concerned at the lack of capacity in digital infrastructure. The take-up of high-speed broadband by business is low compared to other world cities, and there are areas of the city that cannot access superfast broadband, with these “not spots” particularly prevalent in some parts of the city. Business sees these as priority areas for action by the Mayor.