Lighthouses
Towers with light beacons to guide ships at sea, representing significant state investment in maritime infrastructure.
Core metadata
- ID: lighthouses
- Era: Classical
- First known date: -280 (decade)
- Region: Alexandria / Pharos and Hellenistic Mediterranean harbors
- Review status: source_checked
- Maturity: N/A
Prerequisites
- Classical Monumental Construction (construction)
- Fire Control (fire_control)
- Harbor Engineering (Breakwaters) (harbor_engineering_breakwaters)
- Masonry (masonry)
- Navigation (navigation)
Dependents
- None.
Fields
- None.
Node sources
- Lighthouse of Alexandria (Encyclopaedia Britannica, 2026, textbook) • Supports: node
Prerequisite edge evidence
Edge/source evidence summary:
- Prerequisite edges: 5
- Average edge confidence: 72%
- Prerequisite sources: 4
- expert_inference: 5
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Navigation (navigation) | enabling | 68% | expert_inference | Navigation provides a capability that enables this technology without being the only possible path. |
|
| Classical Monumental Construction (construction) | enabling | 68% | expert_inference | Construction provides a capability that enables this technology without being the only possible path. |
|
| Fire Control (fire_control) | historical_predecessor | 75% | expert_inference | Fire Control is an earlier historical predecessor or foundation, not a one-to-one engineering dependency. |
|
| Masonry (masonry) | enabling | 68% | expert_inference | Masonry provides a capability that enables this technology without being the only possible path. |
|
| Harbor Engineering (Breakwaters) (harbor_engineering_breakwaters) | enabling | 82% | expert_inference | Harbor infrastructure often co-evolves with lighthouses and can support their siting and operation, but it is contextual rather than strictly required. | No sources recorded. |
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