Spain · Restored
Castillo de San Juan Bautista
The Castle of St John the Baptist (Castillo de San Juan Bautista), also known as Castillo Negro, is a 17th-century coastal fort in Santa Cruz de Tenerife on the island of Tenerife, Canary Islands. Built from dark volcanic stone and later altered in the 18th century, it served as a principal defensive fortification for the port and remains a preserved historic fortress converted to a museum in the 20th century.
First raised
1641
Its prime
1765
Today
Restored
As it stood in 1765
What Castillo de San Juan Bautista looked like in its prime.
A low, compact artillery fort of dark volcanic (basalt) masonry with a curved, almost circular curtain wall and a slightly raised central entrance enframed by squared ashlar. The profile is dominated by two cylindrical corner watch-turrets (bartizans) and a larger cylindrical sea-facing tower added in the 1765 works. The stone is dark grey-black with regular coursing on the upper parapet, broad stone steps up to a heavy wooden gateway, and the fortress sits directly at the harbour edge.
Its story
The story of Castillo de San Juan Bautista.
The Castle of St John the Baptist — the Black Castle, for its dark volcanic stone — was built between 1641 and 1644 as the second-most important fort in the defence of Santa Cruz de Tenerife. It was rebuilt in 1765 with the addition of a cylindrical tower facing the sea.
In 1684 Charles II of Spain gave the Cabildo de Tenerife, the island's governing body, the power to appoint the castle's warden. The island's nobility coveted the post as the surest proof of noble status and for its privileges: the warden ran the port police, granted permits for ships entering and leaving, charged fishing rights, mediated between fishermen and townsfolk, and collected tariffs on salt and flour.
The fort remained in military use until 1924 and was converted to a military museum in 1948. Each year a re-enactment of the Battle of Santa Cruz de Tenerife is staged at the fort, commemorating Admiral Horatio Nelson's unsuccessful attempt to invade the city on 25 July 1797.
Step inside
6 places to explore in 1765.
The record describes 6 distinct spots at Castillo de San Juan Bautista — including the full exterior approach. Create your own photoreal reconstruction and walk through every one — more scenes means more rooms, more angles, and more of the place to stand in.
Create History
Recreate Castillo de San Juan Bautista with AI to explore it.
The artist rebuilds it as it stood in 1765 — a photoreal walk that belongs to you alone. Pay with coins, no subscription needed.
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