Berenike Troglodytica — Northern Lagoon Extension Harbour
Berenike North Lagoons · Baranis North Harbour · Berenice Troglodytica second basin
Ptolemaic to Byzantine (275 BCE – 600 CE)·Ptolemaic / Roman·🇪🇬 Red Sea Governorate, Foul Bay (Sinus Immundus), Ras Benas south, Egypt
About
About Berenike Troglodytica — Northern Lagoon Extension Harbour
Northern extension of Berenike harbour system in Foul Bay, where second lagoon basin north of main Ptolemaic-early Roman harbour preserves submerged Ptolemaic pier, reef-pass channel and late Roman ashlar quay now 0.5–1.5 m under reef flat after reef growth and siltation. Founded ca.275 BCE by Ptolemy II, premier Red Sea terminus for Indian trade until abandonment c.600 CE. Polish-American Berenike Project 1994–2020 (Sidebotham-Hense) mapped twin lagoons; northern basin held frankincense anchorage and lighthouse base posited on reef island. Distinct from main Berenike lagoon already in DB by focusing on northern reef-pass second harbour.
Why it mattersTwin-lagoon model proves Berenike could double-handle monsoon fleet — lighthouse on reef island explains Strabo's Foul Bay hazards; northern pier amphora stacks contain Axumite and South Arabian wares.
Open questions
Mysteries & theories
Mysteries
- 01Lighthouse location — north vs main lagoon reef island
- 02Mole construction vs reef-cut channel
Theories
- 01Northern lagoon was Ptolemaic first harbour, later silted to Flavian second harbour south
- 02Reef growth closed channel after 500 CE
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- ca.275 BCE Ptolemy II Philadelphus
- Period
- Ptolemaic to Byzantine (275 BCE – 600 CE)
- Culture
- Ptolemaic / Roman
- Purpose
- Premier Indian-Ocean terminus: incense, pearls, pepper to Nile via Coptos road
- Abandoned
- c.600 CE (Sasanian disruption, reef closure)
- Rediscovered
- 1994 Polish-American Berenike Project
- Excavation
- Submerged
275 BCE
Ptolemy II founds Berenike on Foul Bay with lighthouse
30 BCE–100 CE
Augustan Berenike peak — twin lagoon harbours handle Indian fleet
1994–2020
Sidebotham-Hense project maps northern lagoon reef-pass pier
On the ground
Structures & features
23.9220° N · 35.4820° E · 0 m · 3 mapped features
Northern Lagoon Reef-Pass Pier
harbourSubmerged pier and reef-cut channel at –0.5 to –1.5 m across Foul Bay north
23.9230° N · 35.4830° EReef Island Lighthouse Base (hypothesized)
lighthouseCoral-rag footing posited as lighthouse base on reef island
23.9210° N · 35.4840° EAshlar Quay Strand (late Roman)
harbourLate Roman ashlar quay strand with Pepper-trade amphora piles
23.9225° N · 35.4810° E