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Figure 2. The rock-cut "Tomb of Zechariah" circa 100BC
in the Kidron valley, Jerusalem.
of Comninos, but in 1927 it was badly damaged by an
earthquake which also weakened the dome over the
Rotunda and other parts of the Church. The Mandate
Government of Palestine took remedial action to stop the
collapse of the Edicule. A steel cradle (Fig.1) was erected
around the outside. Timber wedges were inserted between
the steel girders and the load-bearing stone walls of the
Edicule. In the 65 years since then, it has not been possible
for the Christian communities in the Church of the Holy
Sepulchre to agree on what should be done to repair the
damage sustained in the 1927 earthquake. The structure is
in a parlous state. The temporary steel and timber shores
show signs of loosening. Misalignments of important
structural stonework are obvious. Despite such
dilapidations, the Edicule is in almost continuous
occupation by priests, pilgrims and tourists. In the 1960's
the improved ecumenical atmosphere engendered hopes
that action could be agreed and work put in hand to renew,
restore or repair the Edicule, or at least to make it safe. A
survey of the Edicule was required before any
reconstruction began, not only to provide a historical
record never before made in accurate detail, but also to aid
reconstruction. This paper is a description of the surveys,
photography and some photogrammetry undertaken as a
result of the 1989 and 1990 site visits. Some descriptions
and illustrations of photogrammetrically derived graphics
which are being produced are also given. The overall
objectives of the combination of archaeology and
photogrammetry are to be found in Biddle et al (1992).
2. REASONS FOR A PHOTOGRAMMETRIC
SURVEY.
Several complex and very sensitive matters must be
recognised and understood before any survey can be
undertaken. Some of these have been described in the
previous section of this paper. Others originate in history
but are part of the daily lives of those who live and work
in the Church of the Holy Sepulchre. These matters are
related to ownership of and responsibility for the Holy
Places. They are governed by an arrangement known as
the "Status Quo" which has been ratified by the Treaties
of Paris (1855) and Berlin (1878), by the British during
the Palestine Mandate, by the Hashemite Government of
Jordan and most recently by the Government of Israel.
Under the Status Quo, ownership of, access to and
responsibility for the Edicule (and other places) are
described in relation to the three major religious
Communities (Greek, Latin and Armenian) and the three
minor (Coptic, Ethiopian and Syriac) present in the Holy
Sepulchre. Since these arrangements have never been
formally described, but only ratified by successive
international treaties and state governments, they are
continually under contention. Each community seeks to
maintain its own rights whilst at the same time watching
others for signs of negligence in maintaining their’s
which might provide an opportunity to take upon itself a
responsibility not hitherto assigned to it under the Status
Quo.
Against this background of complex duties and
responsibilities, daily enacted with fervour, the prime
mover of the survey, Dr G.S.P. Freeman-Grenville,
invited Professor Martin Biddle of Hertford College
Oxford and Magister Birthe Kj¢lbye-Biddle to undertake
an archaeological investigation and survey. For many
years Freeman-Grenville has pointed out the need for
surveys of the Tomb to be made before and during any
restoration (Freeman-Grenville, 1987). Enquiries made
in Jerusalem resulted in permission being granted on the
understanding that the method would be discreet,
non-intrusive and of short duration and would be seen to
involve no risk of damage to or alteration of, the structure.
The archaeological investigators had worked with the
authors of this paper on the recording of the Shrine of St
Alban by photogrammetry prior to its dismantlement and
reconstruction. They recognised that photogrammetry
was the only survey method capable of meeting the above
requirements whilst providing extensive and potentially
very accurate three-dimensional data of the outside and
inside surfaces of the Edicule. Conventional methods of
archaeological recording would take place at the same
time as the photography. The two activities would seem
to an observer to be little different from the note-making
and photography undertaken daily by pilgrims and
tourists. Even an electronic tacheometer on a survey tripod
could be taken for a cine or video camera recording a visit
by a group of pilgrims or tourists. It was therefore decided
that an attempt should be made in April 1989 to see how
much, if any, archaeological investigation and
photogrammetric survey could be achieved in practice. No
reconnaissance was possible prior to that visit. It was
scheduled to last 10 days, including journeys between
London and Jerusalem.
3. SITE CONDITIONS, CONTROL SURVEY AND
PHOTOGRAPHY.
3.1. April 16-25, 1989
It was soon apparent that the control survey measurements
and photographs could not be obtained either quickly or
systematically. The decision was taken that analytical
methods based on a multistation bundle adjustment with