The Bosphorus - Strolling Through Istanbul: The Classic Guide to the City - page 452

the reservoirs and other waterworks with which the forest abounds.
The village has long since disappeared, but its name survives in that
of the forest.
The waterworks, aqueducts and reservoirs, which are scattered
here and there in the hills between this place and the upper end of the
Golden Horn, are very impressive indeed. The aqueducts are almost
entirely the work of Süleyman the Magnificent and his great architect
Sinan, though some of them doubtless replaced more ancient ones.
The first aqueduct one comes to, indeed, not far up the valley of
Büyükdere, is later, the work of Mahmut I, finished in 1732, and
conveys the water from his reservoir and several others to the taksim
in Taksim Square. Mahmut's reservoir, or bend in Turkish, is a very
magnificent one, with its great dam of Proconnesian marble.. The
two aqueducts of Sinan that are most easily visitable because they
are on the main road are also the longest and most impressive. Both
are near the village of Burgaz, the ancient Pyrgos. The first is called
the Bent Aqueduct (Eğrikemer) because it consists of two segments
that meet in an obtuse angle; it is 342 metres long. This aqueduct
seems to have been built originally by Andronicus I Comnenus (r.
1183-5); it was in ruins when Gyllius saw it, and Sinan must have
rebuilt it pretty completely, for all the visible masonry appears to be
of his time. Sinan's other aqueduct, Uzunkemer, the Long Aqueduct,
is beyond Burgaz; it is 716 metres in length and strides across the
valley in a most Roman fashion. These two aqueducts span the valley
of the Barbyzes, the stream now called Kağıthane Suyu, which flows
into the Golden Horn. This stream and its twin, the Cidaris or Alibey
Suyu, together form the once-famous Sweet Waters of Europe, which
in the eighteenth century was a favourite resort of Ottoman society.
The Alibey Suyu is also spanned by two aqueducts of Sinan; these are
much harder to find for the road is quite bad. They are also much
smaller but at the same time more picturesque because they are
closely hemmed in by high hills. The one across the Alibey Suyu itself
is generally called Justinian's (in Turkish, however, Maglova Kemeri);
Gyllius saw this too in ruins, but it was entirely rebuilt by Sinan. The
other, across a tributary of the Alibey, is appropriately called Güzelce
Kemer, the Handsome Aqueduct, for it is indeed very pretty. All