The majestic Holy Trinity Cathedral is not just the primary Orthodox church in Lutsk, but a true architectural gem of all Ukraine. Located on Hradnyi Descent, it is an outstanding 18th-century late Baroque monument that impresses with its monumentality and harmonious forms.

The temple is built as a three-nave basilica with an eight-column structure, crowned by a massive dome. Its facades are richly decorated with arched niches, profiled cornices, and mirrors, giving the building a solemn and elegant appearance. The single-tier bell tower above the narthex serves as an important landmark in the skyline of the city's historical part.
Inside, the cathedral houses unique artistic treasures, including a 17th-century gilded oak iconostasis and wall paintings by the Czech master Fedor Paraliak. Surrounded by a semicircle of former Bernardine monastery buildings, the cathedral forms a cohesive historical ensemble that attracts visitors with its spiritual atmosphere and high traveler ratings.