Place where the Lublin Union was signed.

So here we have the Polish zloty, nominal - 5. The year of issue of this coin is 2017. Mint: Warsaw, Poland. Total circulation – 1.200.000. The coin is dedicated to the Chapel of the Holy Trinity in Lublin.

The Chapel of the Holy Trinity, also known as Lublin Castle Chapel, is a Gothic chapel with a Renaissance gable located within the courtyard of Lublin Castle in Lublin, Poland. Now the chapel adjoins the museum of the castle complex and is an integral part of the site. It is known for its fifteenth-century frescoes in the Byzantine or Orthodox style, unusual for Catholic Poland.

The chapel was most likely constructed before 1326, when it was part of the castle complex. In the 14th century, it was a single-storey building with a crypt. In 1407, the chapel was rebuilt in the gothic style by order of King Ladislaus II Jagiello (Jogaila of Lithuania). After increasing the height of the walls, the chapel became a two-storey structure, maintaining the old crypt.

During the Renaissance, the church maintained a gothic character, however the entrance was positioned on the first floor and was framed by a new Renaissance portal, made in the Komasków masonry workshop. It wasn't until the 17th century that the façade of the chapel was crested with a gable and attic in the style of the Lublin Renaissance.

During the parliamentary sessions in 1569 regarding the Union of Lublin, a holy mass was held at the Holy Trinity Chapel, asking for successful deliberations. Some of participants left inscriptions on the walls of the chapel commemorating the event.