Berlin is the federal capital of Germany and one of the 16 states that comprise it. It is the largest city in Germany and the second largest city in the European Union after London. Berlin extends over an area of 891 square kilometers and is located in northeastern Germany, about 70 kilometers from the Polish border. The city's population is approximately 3.6 million. It is one of the most important cultural cities in Europe and the world, as there are more than 48 museums, dozens of exhibitions, music is active, and there is a large opera house, and there are four prestigious universities and 14 colleges in the city, and there are many amazing monuments because it passed Including many civilizations and empires throughout history, and UNESCO has placed many landmarks in Berlin on the World Heritage List, including the palaces and gardens of Berlin and Potsdam. This city was for a long time divided into a western part and an eastern part, and between these two parts was the Berlin Wall, which was demolished, and some parts of it remained as a historical landmark that testifies to that historical period.