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ambulatory (byz. arch.)
A continuous passage that envelops the naos or the centrally planned core of a structure. In a cross-domed church, where the dome is supported on four masonry piers and between each pair of piers two columns are inserted, the ambulatory is formed by the lateral aisles and western part of the church. Later on, an ambulatory could also envelop a cross-in-square core. During the Palaeologan period, ambulatories, usually serving as funerary chambers, were added to many middle-Byzantine churches of Constantinople.
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baptistery
The building or room used for Baptism. It had a font usually in the form of a cross. After the 6th c. the baptisteries constitute distinct constructions- octagonal, circular, cruciform- detached to the church or its courtyard.
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barrel-vault
vaulted, semi-cylindrical construction used often as roof.
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bema
The area at east end of the naos in Byzantine churches, containing the altar, also referred to as the presbetery or hierateion (sanctuary). In these area take place the Holy Eucharist.
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cistern
A receptacle for holding rainwater, but also water transported from elsewhere, in order to keep it stored. The cisterns were either covered eiter open, and they could have more than one compartements.
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dervish
A member of one of the religious fraternities of Islam that were characterized by spirituality, a mystical relationship with the divine, and a modest way of life. The most known among the dervish orders in the Ottoman Empire are the Mevlevi and the Bektashi.
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dome
A characteristic element of Byzantine architecture. The dome is a hemispherical vault on a circular wall (drum) usually pierced by windows. The domed church emerges in the Early Byzantine years and its various types gradually prevail, while they are expanded in the Balkans and in Russia.
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domed octagon
A type of church architecture featuring a square plan, its corners bridged by squinches, which supports a dome on the resulting octagon.
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Greek cross-domed octagon
This type combines a centre bay in the shape of a domed octagon with the barrel- (or groin-) vaulted arms of a Greek cross, the whole enclosed in an outer square or rectangle. The resulting oblong corner-bays are used as chapels.
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katholikon
The main church in a monastic complex, heart of the monastic activity.
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marble revetment
Τhe facing of a wall with slabs of marble
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narthex
A portico or a rectangular entrance-hall, parallel with the west end of an early Christian basilica or church.
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niche
Semi-circular recess on the surface of the wall.
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opus mixtum (ουδ.)
Masonry consisting of small stones and abudant mortar, which often interchange with horizontal double rows of plinths.
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orans
(lat., mean. praying): An iconographic type which was used mainly for representations of the Virgin in Byzantine art. It depicts a standing, frontal figure with its hands open, lifted to shoulder height to either side.. It was the typical early Christian posture of praying, byt in Middle Byzantine years, when the prayer is depicted with the proskynesis type, the orans type becomes more rare.
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porch
The covered space at the front of a gate on the building's entrance or a stoa.
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pronoia
("care", "forethought") An institution that goes back to the 11th century. It refers to estates granted to a prominent military official or to the Church; it also designates in general the right of an individual of areligious foundation to receive directly from citizens of farmers whatever dues they would normally be obliged to pay to the state. The holder of a pronoia was called pronoiarios. The pronoiai could not be inherited by the family of military officials after their death, while when a donation was made to the Church, the pronoia was considered full and permanent.
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pseudo-octagon church
A variant of the domed octagon. Its peculiarity lies in that the 8 arches of the octagon core bearing the dome are uneven. According to the way this asymmetry is arranged, the pseudo-octagon churches fall into 4 main categories.
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recessed brick technique
A masonry technique in which bands of wider and smaller bricks are alternated. The smaller bricks rows are slightly recessed and covered with mortar, thus creating an alternation of red (brick) and light-colored (mortar) surfaces.
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sebastos
("venerable") Title of honour created by Constantine IX the Monomachos in the middle of the 11th century. Originated from the translation of the imperial adjective augustus. This title was given successively to the two mistresses of the emperor.
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tekke
Lodge for the members of a religious order (dervishes).
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