The Missing Plan

In an attempt to put into perspective the features that are missing from the official story, everything in the background that is red is entirely missing from the official plans and the story of these tunnels.

The Historical Timeline

Amedeo Maiuri’s Plan ~ Late 1950s

Amedeo makes no attempt to investigate the tunnels and puts them out of bounds. He forbids his workmen to venture in.

The reason given is that toxic vapours might be present and dangerous. The tunnels are forgotten.

The Official Guide to Baia

The official guide to Baia makes no attempt to define the Greek Temple area and it simply cuts of the tunnel with no reference to it. 

The guide concentrates on the Roman bath use of the surface buildings – Le Piccole Terme.

The Sign at Baia

The site sign is printed in white on yellow behind reflective plastic. This renders it almost unreadable. It’s fortunate that this picture has a shadow on it to help.

It is a simplified version of the plan in the official guide, with bath usage wrongly identified.

Red parts in the background have no interest to those who have assumed that these tunnels were dug solely to supply steam to three tiny baths at the surface.

An immense and astonishing work of engineering simply attracts no interest. They reveal no artifacts for museums, nor are they suitable for any form of tourism.

Dr Paget’s Plan ~ 1964 

Doc Paget explores. He notes the extensive tunnel network inside the crater wall. 

Doc also undocumented features behind the surface buildings: the connection at the back of the Tholos; the two tank chambers in the hill; the staircase behind Big D; the passage in the base of South Tank.

Fikret Yegül ~ 1996


Fikret Yegül redraws Amedeo’s original plan. While aware of Doc Paget’s work, he misunderstands and misquotes it. He is also somewhat disparaging of it.

Yegül, for reasons best known to himself, invents two chambers very close to the entrances into the hill, including the Great Antrum, which he cannot possibly have entered.

Maura Medri ~ 1999

Maura Medri published this plan in a paper called ‘In Baiano Sinu’. This was a rework of an old paper of the same name, originally published in 1992.

A footnote mentions a working group with speleologists Graziano Ferrari and Raffaella Lamagna – a shared project.

A1, multi-purpose room
A2, tepidarium/destrictarium with bath A13
A3, passing passage room
A4, circular room, laconicum
A5, caldarium with three tubs
A6, frigidarium with two tubs
A8, entrance hall
A9, service area
A11, external plaza
A12, stairs
A14, area of facade arcade
A15, multipurpose room
(reworking from Campi Flegrei 1990)