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New perspectives to save cultural heritage
Altan, M. Orhan

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an octagonal
Cl PA 2003 XIX" International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
nave is the centre of an irregular square, a rectangular narthex is
on the west, a half hexagonal apse on the east. Figure 1 presents
KAM; the photogrammetric image was taken from a a lifting
One of the major problems can be seen directly: the main
railway on the European side of Istanbul which was built
between 1870-1890 runs directly along the south side of the
building in a very short distance of only a few meters. The
traffic on this railway is very heavy today: trains are passing in
10-minutes intervals the building.
the elements minaret, tomb and a square with medrese and
fountain for the washing, cf. figure 3.
Figure 1. Gereral view of KAM and railway
On the one hand the railways vibrations act directly at the
structure of KAM; on the other hand there is a compression of
the soil beneath the rails. Such a compression may disturbs the
situation of the groundwater especially the drain off. In that
context some further explanations shall be given: the height of
KAM over sea level is only a few meters because the building
was erected in a distance of about twenty meters to the old town
wall which was built next to the seaside. Today there is a big
street on a filled ground between old town wall and coastline.
At the other (northern) side of KAM the terrain rises up to the
place where the hippodrome was found in historic times. That
situation and the compression of the soil are reasonable for
problems concerning the groundwater.
Beside the manyfold importance of the KAM an extraordinary
but not well known beauty of the monument exists, which can
be seen only inside the central octagon. To give a small
illustration of that inherent beauty a panoramic image was
computed by merging nine photographs which is shown in
figure 2.
The existent fund of photogrammetric and other images is a
document of different things which happened at KAM. For
example the development or the condition of the building can
be seen. Three concrete examples are presented in the
The first example gives an impression of the integration of the
KAM into a general architectonical situation. After changing
the byzantine church into a mosque some typical islamic
architectonic elements were appended in- and outdoor, outdoor
Figure 2. Panoramic image of the central octagon
Figure 3. Architectonical ensemble of KAM
in the last century, [1]
In the year 1979 the visitor could see the square (figure 4), but
in the nineties he couldn’t (figure 5). The utilization of the
medrese had changed; some parts were rebuilt or reorganized.
Today the medrese houses some tourist-shops. Due to these
developments, a few new jobs were created on the one hand but
on the other hand the architectonic situation (the aesthetics of
the ensemble) was disturbed completely.
In the second example we see an orthophoto of the north wall
of KAM generated by some photogrammetric images. This
orthophoto shows 1500 years of changing, repairing of
problems and damages: recording with the help of visualization.
Such an orthophoto can be a hot spot of information and a very
great help for the work of experts dealing with such old
monuments. Let us have a detailed look at the situation of the
central north side. There we will find some evident hints to
conclude that the building entrances have changed.