Brussels,the capital of Belgium.

By seeing the accommodation in Belgium the nations agree to set up union parliament here.

Location of the European Union Parliament
The European Union Parliament is located in Brussels, Belgium. It is one of the three official seats of the European Parliament, with the other two being in Strasbourg, France, and Luxembourg.

Role of the European Union Parliament
The European Union Parliament is the legislative branch of the European Union and is responsible for passing laws, supervising the EU's budget, and representing the interests of EU citizens. It is made up of Members of the European Parliament (MEPs) who are elected by the citizens of EU member states.

Functions of the European Union Parliament
- Legislative Functions: The European Parliament has the power to amend, approve, or reject legislation proposed by the European Commission.
- Budgetary Functions: The Parliament plays a key role in deciding on the EU budget, ensuring that funds are allocated appropriately and overseeing their use.
- Oversight Functions: The Parliament monitors the activities of the European Commission and other EU institutions to ensure they are acting in the best interests of EU citizens.

Composition of the European Union Parliament
The European Parliament is made up of 705 MEPs who represent the interests of EU citizens. The number of MEPs allocated to each member state is determined by its population size. MEPs are organized into political groups based on their political affiliations, and they work together to pass legislation and represent the interests of their constituents.

Conclusion
Overall, the European Union Parliament plays a crucial role in the functioning of the EU, representing the interests of its citizens, passing laws, and overseeing the budget. Its location in Brussels, Belgium, serves as a central hub for EU decision-making and legislative activities.