Koper, the old Venetian island that became Slovenia's port

An island that became the capital of Istria

According to Visit Koper, the islet was already called Capris in Roman times, and in the 6th century the Byzantine emperor Justin II allowed the town of Iustinopolis to be founded there. Then came Venice. In the 13th century Koper swore loyalty to the republic, which in time made it the administrative, political and cultural capital of Istria. The squares and carved coats of arms date from that era, and so does the Italian name, Capodistria, because the municipality is bilingual today.

For centuries the town was an island. That is why the Muda Gate of 1516 had a bridge in front of it leading to the mainland, topped by a Venetian fortress that collected tolls on goods. The Austrians pulled it down in 1820. The gate is the only one left of the twelve the walls once had, and it leads to Prešeren Square and the Da Ponte Fountain, recorded from 1423 and rebuilt in Baroque style in the mid-17th century.

What to see in Koper’s old town

Everything revolves around Tito Square. The Praetorian Palace closes its southern side, built in the 13th century and remodelled in the mid-15th, with an outside staircase, a balcony and a statue of Justice; today it is the town hall and tourist office, and in October 2026 it ran tours at 11am and 3pm for €5. Opposite stands the Cathedral of the Assumption, which according to Visit Koper holds Slovenia’s largest organ and paintings by the Venetian Vittore Carpaccio.

Beside the cathedral rises the 54 m bell tower. Its origins are placed in the 12th century; it was rebuilt between 1418 and 1480 and has looked as it does now since 1664, while the clock dates from 1463. At the top hangs the bell of St Nazarius, cast in Venice in 1333, the oldest one still in use in the country. You can climb it daily between 9am and 5pm for €8, or €5 reduced.

What I like most about Koper comes after that, the web of small squares. Brolo Square, the old market, is now a garden with two Gothic fountains from 1485 that once collected rainwater. Carpaccio Square, by the old harbour, has the house attributed to the painter or his son and a column marking the victory at Lepanto. For background, the Regional Museum occupies the 17th-century Belgramoni Tacco Palace.

Day trips from Koper

Koper is the best base for inland Slovenian Istria. About twenty minutes’ walk from the station begins the Škocjan Inlet nature reserve, a brackish wetland with hundreds of birds and free entry. Higher up, on the edge of the Karst, Socerb Castle looks out from more than 350 m over the gulfs of Trieste and Koper. Inland, within the same municipality, the church at Hrastovlje holds the Dance of Death, frescoes finished in 1490 that are, for me, the most striking sight in the area.

Visit Koper also suggests driving up to Marezige, about twenty minutes away, the village of refosco wine, with a viewpoint over the gulf and Slovenia’s first wine fountain.

If you are staying the night, see the best hotel deals in Koper for your dates: the well-placed rooms go fast.

Getting to Koper

Koper is 100 km from Ljubljana on the A1 motorway, which needs a vignette, and 20 km from Trieste. By bus, Ljubljana station listed 33 departures on Monday 19 October 2026 and 24 on the Saturday, taking 1h20 to 2h23. Since late September 2026 the Ljubljana to Piran line stops short at Izola, so Koper and its station matter more as a place to change. To carry on along the coast, Izola is 7 km away, and to plan the whole region, see the guide to the coast and Karst.

How long to give Koper

I would give Koper half a day at the very least, ideally the morning. Climb the tower early, walk the squares and the Muda Gate, eat something Istrian and keep the afternoon for Škocjanski zatok or Socerb. If you sleep here rather than in Piran, you gain transport links in exchange for a less pretty seafront. Above the town, on the edge of the Karst, the Osp crag has more than 800 climbing routes.

If you are staying the night, see the best hotel deals in Koper for your dates: the well-placed rooms go fast.