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Koper

Koper is Slovenia's only commercial port city, situated on the Adriatic Sea. Here you can enjoy both seaside scenery and the lively atmosphere typical of a harbor town.

Updated August 15, 2026 · Edited by the World by City editors

Koper
Gateway airport
Ljubljana Jože Pučnik Airport
Best season
Apr–Aug
Time zone
Europe/Ljubljana
Sights covered
38 places

Sights worth seeing

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Trieste Cathedral

Museums & galleries

Trieste Cathedral

A Roman Catholic cathedral in Trieste, Italy. Dedicated to Saint Justus, it serves as the seat of the Diocese of Trieste.

Risiera di San Sabba

Museums & galleries

Risiera di San Sabba

This was a Nazi concentration camp in Trieste, the only one on Italian soil equipped with a crematorium. It now stands as a memorial site for reflecting on this painful chapter of history.

piazza Unità d'Italia

Parks & gardens

piazza Unità d'Italia

Piazza Unità d'Italia is the main square of Trieste, Italy, facing the Adriatic Sea. Laid out during the city's heyday as a thriving port, it is lined with the city hall and grand palaces.

Assumption of Mary Church, Koper

Temples & religious sites

Assumption of Mary Church, Koper

This cathedral in the Slovenian coastal town of Koper is the seat of the Diocese of Koper and its principal Catholic church. It's a great spot to admire the architecture while exploring the town center.

Astronomical Observatory of Trieste

Attraction

Astronomical Observatory of Trieste

This astronomical research institute is located in Trieste, in northern Italy. It attracts travelers interested in stargazing and astronomical research.

Greek Orthodox Church of San Nicolò dei Greci

Temples & religious sites

Greek Orthodox Church of San Nicolò dei Greci

A Greek Orthodox church built in the 1780s. It was redesigned by architect Matteo Pertsch, and its iconostasis was painted by Spyridon Sperantzas.

Civico museo del Castello di San Giusto

Museums & galleries

Civico museo del Castello di San Giusto

A medieval castle standing on a hill beside the cathedral, one of the city's iconic landmarks. Walking along walls built over nearly 200 years, visitors can trace how fortification techniques evolved through the ages.

Roman Theatre of Trieste

Museums & galleries

Roman Theatre of Trieste

These are the ruins of a Roman-era theatre, with traces of the original structure still visible today. Walking among stones that have endured for centuries, you can get an up-close look at the remnants of the ancient city.

How many days do you need?

Routes grouped by travel distance so each day stays comfortable.

Average temperature by month

5-year average

Jan
Feb
Mar
12° Apr
17° May
22° Jun
25° Jul
25° Aug
20° Sep
16° Oct
11° Nov
Dec

Getting there

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Getting around the city

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Fares and timetables change often, so we don't list them here. Check the operator or the booking site for current prices and schedules.

Koper Tours & Experiences Booking

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Local data

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Where to stay

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