The Schengen Agreement was signed on June 14th, 1985, in the small town of Schengen in Luxembourg. It represents a treaty between many European countries that abolished border controls between those countries and allowed for the free movement of citizens within the Schengen Area.

The agreement was later incorporated into the European Union (EU) through the Amsterdam Treaty in 1999. Today, the Schengen Area comprises 26 countries, including most EU member states, as well as Iceland, Liechtenstein, Norway, and Switzerland.

For EU citizens, the Schengen Agreement is particularly significant because it enables them to travel freely within the Schengen Area without the need for a visa or other forms of documentation. This is because EU citizens have the right to free movement within the EU, which is guaranteed by the Treaty on the Functioning of the European Union.

In practice, this means that an EU citizen can enter any country within the Schengen Area and stay for up to 90 days without needing a visa. This applies regardless of whether they are travelling for work, study, or leisure. However, it is important to note that EU citizens are still subject to border checks when entering and leaving the Schengen Area, and that there are limitations on the amount of time they can spend in any one country.

It is also worth noting that the Schengen Agreement does not apply to non-EU citizens. While some non-EU citizens may be able to enter the Schengen Area without a visa, this is subject to a variety of conditions and restrictions, depending on their nationality and the purpose of their visit.

In conclusion, the Schengen Agreement has had a significant impact on the way EU citizens travel and work within the EU. It has enabled them to move more freely and easily between countries, and has helped to create a more integrated and interconnected Europe. However, it is important for both EU citizens and non-EU citizens to be aware of the limitations and conditions of the agreement to ensure a smooth and hassle-free travel experience.