Tower of Hercules

Overview

The Tower of Hercules is a Roman lighthouse on a rocky headland at the northern tip of A Coruña, and the only lighthouse built in antiquity that still does the job it was built for. Archaeology puts its construction in the second half of the 1st century AD, on a hillock called Punta Eiras between Punta Herminia and Punta Orzán, roughly 57 metres above the water. It is a registered maritime signal, number 03530, showing a white flash group visible for 23 nautical miles.

Two things bring people here. One is the climb, 239 steps of stone staircase threaded through the Roman core, ending on a balcony with the Atlantic on three sides. The other is the headland itself, 47 hectares of clifftop paths, coves and open-air sculpture protected as a Natural Area of Local Interest and free to walk at any hour. Skipping the climb for the park alone is a reasonable call on a bad-weather day.

What you are looking at from outside is an 18th century granite skin. What you walk through inside is Roman. UNESCO listed the tower in 2009 on the strength of both: more than 60 per cent of the original lighthouse survives within the casing, and the casing itself is held up as an early example of restoring an ancient monument rather than replacing it.

Roman sailors knew it as Farum Brigantium; medieval documents call it the Lighthouse, or the Old Castle. The Hercules label belongs to the modern era and comes from a legend written down by Alfonso X, tying the building to the hero’s victory over the tyrant Geryon. That legend is why the city’s coat of arms shows the tower standing over a skull.

History

Sometime in the second half of the 1st century AD, Rome put a lighthouse at what it considered the end of the known world, marking the entrance to the Golfo Ártabro and the rías of O Burgo, Betanzos, Ares and Ferrol. The man credited with it left his name at the foot of the building, which almost never happens with Roman infrastructure. The inscription, preserved inside the base platform under an early 19th century shelter, reads MARTI AUG SACRUM C SEVIUS LUPUS ARCHITECTUS AEMINIENSIS LUSITANUS EX VOTO: consecrated to Mars Augustus by Gaius Sevius Lupus, architect of Aeminium, modern Coimbra, in fulfilment of a promise.

When Rome went, the shipping went with it. Atlantic traffic collapsed, the light stopped, and the tower was demoted to a watchtower, then to the city’s quarry: residents prised the blocks out of the external ramp and the outer walls one at a time and built them into new houses. By the 14th century almost nothing of the ramp was left, which also removed the only route up to the chambers and the beacon.

Getting the light working again meant cutting a staircase up through the inside of the Roman structure, straight through three of its vaults. That crude stair is what the 18th century restoration later replaced with the stone one you climb now.

The 19th century was about light rather than stone. In 1799 the Consulado del Mar sent the naval captain José de Mendoza to London to investigate a rotating flashing system burning oil; it cost so much that a public subscription had to cover part of the bill. The old reflector setup gave way to a modern one in 1847, and from 1850 to 1853 the tower housed a school for lighthouse keepers run by the watchmaker Agustín Antelo. The lantern that ran from 1854 to 1904 used Fresnel optics and now sits in the National Museum of Science and Technology in A Coruña. Electricity arrived in 1927.

Nobody dug under the tower until 1992. Work began that June under the archaeologists Luis Caballero Zoreda and José M. Bello Diéguez, part of the restoration project led by Pablo Latorre that reopened the monument to the public. The excavation fixed the construction date in the second half of the 1st century, exposed the stubs of the lost helical ramp, and turned up coins, terra sigillata fragments and a silver quinarius now held by the archaeological museum at the Castelo de Santo Antón.

The World Heritage campaign took twenty-three years, from a first request in March 1986 by the writer María Victoria Fernández-España to the dossier funded by the institute José Luis Vázquez Iglesias set up in 2001. At 18:26 on Saturday 27 June 2009, at the committee’s 33rd session in Seville, the tower was inscribed under criterion III.

Engineering

The tower is a square shaft of roughly 11.75 metres a side standing 55 metres tall, of which 34.38 metres are Roman and 21 metres are the storey Giannini added in 1789 to carry a modern lantern. It sits on a polygonal platform 32.40 metres across, laid at the beginning of the 19th century, which buries a further 3.20 metres of Roman fabric. Add that up and 37.58 metres of the original lighthouse are still standing, most of it invisible.

Inside, the Roman core is stacked in three levels of unequal height, 9.20, 9.60 and 14.35 metres, each holding four square chambers of about 2.70 metres a side, originally roofed with barrel vaults. The four rooms on a floor were never all linked. They were connected two by two on an east to west line, which stopped a fire in one chamber spreading through the whole level and made the tower harder to take if someone got inside.

The ramp is gone, but you can still read it on the outside. The helical strip that spirals up all four faces of the granite casing traces where it ran; traces were still legible on the walls when Giannini started work in 1789, and he kept the line. The casing did more than decorate. Roman dividing walls were 1.50 metres thick; once the new façades were fused onto the old core between 1788 and 1790, the walls thickened to the 2.10 or 2.15 metres they measure today.

Above the Roman crown sit two octagonal bodies. The lower one is the Giannini room, an eight-sided chamber with four radial pillars leaving a ring corridor and a continuous stone bench, capped by a false dome. On one pillar the engineer left his own inscription, in the same spirit as the Roman architect at the bottom of the tower: DIRIXIÓ ESTA OBRA EL THENIENTE DE NAVÍO INGO ORDINARIO DE MARINA D. EUSTAQUIO GIANNINI, the naval engineer Eustaquio Giannini directed this work.

The second octagon was built as the lantern and altered soon afterwards. When the rotating oil system was installed, the dome came off, a beacon 3.2 metres in diameter was founded in its place, the now useless lantern windows were walled up, and a spiral stair was added on the outside to reach the upper balcony. That stair is hidden inside the cylinder with a conical cap that gives the tower its odd silhouette, which doubles as the mounting for the lightning rod.

The optics have kept moving with the technology while the masonry has not. The tower now shows a white light on a twenty-second cycle, four flashes then a long gap.

Visiting

Tickets are 3 euros for general admission and 1.50 euros reduced, and entry is free every Monday of the year. Opening is daily and splits into two seasons: 10:00 to 21:00 from 16 June to 15 September, with last admission at 19:45, and 10:00 to 17:00 from 16 September to 15 June, with last admission at 15:45. The tower and offices close on 24, 25 and 31 December, on 1 January, on the afternoon of 5 January and on 6 January.

Access is capped at 20 people every half hour, with the first slot at 10:15. Tickets go on sale at the CIAV visitor centre from 09:45 and online through the council’s booking page, and the tower states plainly that same-day capacity can fill before closing time and that walk-ups may be turned away.

The visit starts at the CIAV, at the foot of the ramp up to the tower. One half is a reception desk selling tickets and city tourist information; the other is an interpretation space with relief maps of the trade routes the lighthouse served, a model of a Roman trireme, and paired models comparing a reconstruction of the Roman tower with the building as it stands. There is also a copy of the Tabula Peutingeriana and a bronze Hercules by Francisco Leiro, carrying his mace and wrapped in the skin of the Nemean lion. Leiro made the tower’s bronze doors too, their reliefs running through the lighthouse’s myths.

Then comes the climb. The staircase winds up through the base and past the Roman chambers, and the last stretch brings you into the Giannini room before the door to the balcony. Most people spend ten to twenty minutes at the top watching shipping work in and out of the port.

Outside, the park is the other half of the visit and costs nothing. It spreads across the tower peninsula, Punta Herminia, O Acoroado and Cabal de Pradeira, and the sculptures are set along the paths rather than gathered in one place, among them Breogán, the Caracola, the Menhirs, the Monument to the Executed and the Muslim cemetery known as the House of Words.

A phased programme of works on the monument and its surroundings began in March 2026, starting with the access ramp and the perimeter beam, and covering the refurbishment of the Giannini room and the headland paths. Check the council’s news page before you travel if the interior is the point of your trip.

Tips

• Book online rather than turning up. With 20 people admitted every half hour and the first slot at 10:15, the day’s capacity can run out well before closing, and the tower says outright that late walk-ups may be refused.

• Winter hours are short. From 16 September to 15 June the last admission is 15:45, which catches out anyone planning the lighthouse as an afternoon activity.

• Free entry is broader than just Mondays. It also applies on International Museum Day, on local public holidays, during the city’s street science days and Science Week, and on the third Saturday of every month from October to June. You still have to collect a ticket at the CIAV desk.

• Entry is free rather than reduced for a few groups, including children under three, visitors with a certified disability, teachers and guides working with a group, and holders of the city’s Tarjeta Turística.

• Check the wind before you commit to the climb. The balcony shuts at force 5 and the building at force 7, so on a rough day you can pay, climb and still not get outside at the top.

• Treat the staircase seriously. It is a single stone stair with no lift, cut through the Roman vaults in the medieval period and rebuilt in the 18th century. The park below gives you the tower without it.

• Guided visits are sold alongside the standard ticket, online or at the CIAV, and the council publishes contact details for the professional guide associations if you would rather arrange one privately.

• City buses 3, 3A and 5 stop near the base at the Torre de Hércules stop, about 10 to 15 minutes from the centre for a cash fare of 1.30 euros. Walking from the centre takes 30 to 40 minutes along the seafront promenade, and the tower is about 2.4 km out.