Klis Fortress

Where it sits. Klis fortress occupies a long, narrow limestone crag about 360 metres above sea level, wedged in the pass between the massifs of Mosor to the east and Kozjak to the west, thirteen kilometres northeast of Split. The crag is roughly 300 metres long and never much more than fifty wide, and it plugs the only easy route between the Dalmatian coast and the interior. Everything about the site follows from that: whoever held Klis controlled who reached the sea at Split, and the fortress changed hands accordingly for two thousand years. From the ramparts the view runs south over Solin and Split to the islands of Šolta and Brač, west across the Kaštela bay to Trogir, and north into the dry karst plateau of the Zagora.

Two thousand years of holding a gap. The Illyrian Dalmatae fortified the crag before the Romans took it. In the early medieval period it became a stronghold of the Croatian dukes: Trpimir I issued from Klis in 852 the charter that carries one of the earliest surviving references to a Croatian ruler, and several early kings held court here. Its most retold chapter is the sixteenth-century defence. Captain Petar Kružić and his Uskoks — irregulars displaced by the Ottoman advance — held the fortress against repeated sieges for around a quarter of a century. In March 1537 Kružić was killed in a relief action below the walls and the garrison surrendered; the surviving Uskoks withdrew north to Senj, where they became the Adriatic's most notorious raiders. The Ottomans held Klis until 1648, when Venice took it, and most of what stands today is the Venetian rebuilding: three defensive zones stepping up the ridge, linked by a long ramp and a succession of gates, with the small church of St Vitus at the top, a building that has been a church, a mosque, and a church again.

On screen. Klis is Meereen in Game of Thrones, used from the fourth season onward for the great slaver city on Slaver's Bay. The production shot the exterior sequences here — the approach to the city, the walls and gates, the crowds outside them, and the aftermath of Daenerys's capture of Meereen — because the ridge offered a genuine fortified silhouette with a wide, empty, sun-bleached landscape behind it and no modern intrusion in frame. Everything that made Meereen recognisable beyond that was added: the stepped Great Pyramid, the harpy on its summit, the harbour and the sprawl of the city were digital extensions built over and behind the real ramparts. The interiors, including the throne room and the dragon catacombs, were filmed in the substructures of Diocletian's Palace in Split and on sets in Belfast. Standing on the upper terrace and matching it against the screen is the clearest lesson in how the show's locations actually worked.

What you actually see today. The visit is a climb through three enclosures on rough cobbles and stone stairs, past cisterns, powder magazines, gun platforms and the Venetian gate sequence. A small museum in one of the buildings holds arms, armour and archaeological material, with reproductions of Uskok equipment. The church of St Vitus at the summit is plain to the point of austerity and repays a look precisely for that: its fabric records each change of ownership, from the Venetian rebuilding to the Ottoman minaret that once stood beside it. There is little interpretation outdoors, and that suits the place; the interest is in the way each defensive line uses the shape of the rock, in the cisterns cut to hold a siege supply of water, and in the sheer drop on either side of the ridge, which explains without any signage why the fortress mattered for two millennia. Allow at least an hour, longer with the museum, and rather more if the intention is to photograph the ramparts from the surrounding hillsides.

Getting there and timing. City bus 22 from Split runs to Klis in roughly thirty to forty minutes and stops in the village below the fortress, from where a signposted lane climbs to the gate; by car it is twenty minutes from the centre of Split, with a small car park near the entrance. The village is known along the old road for its spit-roast lamb, cooked in the open at a row of long-established grill houses — a legitimate reason to time the visit around lunch. Conditions on the ridge are severe in both directions: no shade whatsoever in summer, and in winter the bura funnels through the pass hard enough to make the upper terraces genuinely difficult to stand on. The uneven cobbles, stairs and steep ramps rule out wheelchair access and demand proper shoes.