Astronomy - Mathematics
The
large educational centers of the empire, such as Alexandria,
Antioch, Athens
and Istanbul,
were the places where subjects that today belong to science, cultivated. When
Christianity prevailed, a discussion began concerning the creation of the world
and the variations between the knowledge of the ancient science and the
Christian faith. Thus, two interpretative schools were created, that of Alexandria, which interpreted the book of Genesis in an
allegorical way, and that of Antioch,
which favored a literal interpretation of the Scriptures. The acceptance of
greek sciences by the Byzantines wasn’t always smooth, as there were people
supporting them, like Emperor Heraclius, and others that were opposing them.
Arab
sources report the presence of Byzantine scholars in Baghdad
and Damascus,
which from the beginning of the 9th century proved to be centers of
mathematics, especially algebra, and astronomy. In general, Byzantium during that period was in constant
contact with the Arab caliphate and their expertise, both in pacific and
martial works, was largely shared, as can be assumed by the example of the
greek fire.
The
most important evidence about the impact of the arab science to byzantine
scholars, especially where solving of practical mathematical problems and planning
of astronomical tables is concerned, derives from the period of the Komnenos
and the Angels dynasties.
These astronomical
tables contained predictions of the positions of the celestial bodies, the
conjugations and the eclipses that proved to be very useful in calculating
Easter time and making horoscopes. However, for the conservative circles of Byzantium, the involvement
with magic, astrology and occultism was equivalent to the betrayal of
Christianity.
After
the conquest of Constantinople by the
Crusaders in 1204, the educational institutions of the capital, the university
and the patriarchal school collapsed, while their significant libraries scattered
and transferred to the Latin West. In Nice, where most of the scholars settled,
an attempt to reorganize education was made. After 1261, at the University of Istanbul the teaching of four math
lessons (arithmetic, geometry, music and astronomy) began.
The
astronomical knowledge of the latter byzantine period was enriched by both the
Persian astronomy and the West. The special interest of this period focused on
the correction of Ptolemy’s rules and their comparison with rules deriving from
the East, namely Persia,
or from other Western traditions.
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The city:
In the 1st and 2nd century Athens was a wealthy city and one of the
empire’s major intellectual centres, which frequently attracted the attention
and patronage of emperors and wealthy civilians. Hadrian increased the
perimeter of the walls and almost doubled the city’s area. Herod Atticus
adorned it with groups of monuments that have survived in part to this day.
That being said, serious damage was done when the one-time glorious city was
taken by the Heruli in 267, and raided by the Goths under Alaric in 396. The
Acropolis, the Roman agora and Hadrian’s Library were surrounded by a wall,
which became Athens’
main fortification. Plato’s Academy was revitalized from the early 4th
to the early 6th century by the neo-platonic philosophers, who
taught rhetoric and philosophy to promising Christian and pagan youths from all
over the empire; three of its students were Basil the Great, Gregory of
Nazianzus and Emperor Julian. Empress
Pulcheria
was so impressed by the education received by Athinaïs, daughter of the sophist
Leontius, that in 421 she had her forcibly christened Eudocia and wed her to her brother, Emperor
Theodosius
II. The so-called Palace of Giants, founded in the ancient agora in
this period, may have belonged to Eudocia and her family.
Christianity began to make its presence felt in the
city in the early 5th century. A tetraconch which may from the
outset have been a Christian church was erected inside Hadrian’s Library, in
addition to a three-nave basilica on the island in the middle of the Ilissos River, which may have been dedicated to
the memory of Leonides, bishop of the city.Shortly before the middle of the
same century, the Parthenon was converted into the city’s cathedral church and
dedicated to the Virgin Mary. The inhabitants who remained
faithful
to
the idols
seem
to have lived in
fear.
Although the
Panathenaic
procession continued to be
celebrated up until the 5th
century, offering a sense of
respite, it was
stripped of
pagan
rituals. In 529 the Academy and the remaining schools were
closed by decree of Justinian, though whether this was ever
enforced remains a subject of debate. This sealed the economic decline
of a city that had once and for all lost its role as a centre of learning. The
opulent residences unearthed in the vicinity of the Areios Pagos were abandoned
by their occupants, either because they were unable to maintain them in times
of recession or because the Slavs appeared in the late 6th century. In the following centuries
written sources mentioning Athens
are sporadic. Emperor
Constans
II, his army and court
wintered
in
Athens
in 662-663 while preparing a
campaign
against Sicily.
Relations between the local
nobility
and the palace of Constantinople
probably began at this time. Two
Athenian
women became
empresses: Irene, who
was on the throne from 780 to 802; and her niece
Theophano, who ruled
for
a few
months in
811. In the early 9th century the city was promoted from a
diocese to an archdiocese, in accordance with the palace’s wishes rather than
on account of any increase in the population. Private houses were located in
neighbourhoods to the north, west and south-west of the Acropolis, within and
beyond the Late Roman wall. They were generally of makeshift construction, with
rooms arranged around a courtyard, next to workshops and small factories.
Excavations have mainly brought to light house basements full of storage jars.
From the late 10th century, small churches were built in the area
north of the Acropolis. These had clearly defined outlines and were strongly
built of cloisonné masonry, with
domes surrounded by small marble columns. Such churches include Agioi Theodoroi
in Klafthmonos Square
(1049); the oldest surviving church is most probably the catholicon in Asomatoi
Monastery (dedicated to the Incorporeal Saints), better known as Petraki
Monastery, from the late 10th century. Agios Eleftherios (the Small
Metropolis or cathedral) can be placed in the late 12th century. It is not
known whether these churches were privately owned or served as the catholica of
small monasteries.
Basil II the Bulgar Slayer arrived in 1018 to pray in
the Church of the Virgin Mary at Athens,
as the Parthenon was then called. His visit ushered in a period of growth for
the city cathedral as a pilgrim shrine. However,
letters written by the scholar
Metropolitan
Nicetas
Choniates
in the late 12th
century
express sadness at the poverty and
illiteracy
of the people, the
destruction of houses,
the
poor state
of the walls, the
greed
of government
officials
and
pirate raids.
In 1204
Choniates
held
out against
Leo
Sgouros by
gathering
the population
in the Acropolis.
Shortly afterwards
he was forced to
surrender the
city
to
Boniface
of Montferrat,
who appointed Guy
de la Roche as its first Great Lord; in 1259 the city formed part of the Duchy
of Athens, which stretched from Lokris to the Corinthian Gulf and from Evia to
Doris. The de la Roche Burgundians erected the Rizokastro, a new wall around
the Acropolis incorporating a large part of the Late Roman one. This period
of adjustment under the rule of the de la Roches, including the appointment of
a Latin bishop in the cathedral in 1204, favoured the founding or renovation of
new churches in outlying areas only; in the late 13th century
additions were made to the wall paintings in the so-called Omorphe Ecclesia (“Beautiful Church) in Galatsi. Daphni Monastery was
ceded to Cistercian monks and its catholicon became the burial place of the
Dukes of Athens.
From 1311 to 1388 the city passed into the hands of
the Catalan Company, which was notorious for the cruelty of its administration,
while in 1385 the Catalans gave it to Nerio Acciaioli, scion of the renowned
Florentine family that held the sovereignty of Athens until 1456, apart from a
brief period from 1394 to 1403 when it was under the control of the Venetians.
Under the Acciaioli the capital of the duchy was transferred from Thebes to Athens, the palace at the
Propylaea and the Parthenon were renovated, roads were built and a tall tower
was erected at the entrance to the Acropolis fortifications. In 1456 the last
Florentine duke handed Athens
over to the Turks. Two years later this led Mehmed the Conqueror to grant the
Athenians privileges, including the right to retain all churches except for the
Parthenon, which was converted into a mosque.
Heraclius:
Byzantine Emperor from 610 to 641, son of the exarch
of Carthage. He
was proclaimed emperor in 610, when he invaded Constantinople
with a big army from Carthage
and ascended the throne with the support of the Greens and Patriarch Sergius I.
When Heraclius came to power the empire was in a very precarious situation, being
threatened by the Slavs and the Avars in the northern Balkans, and the Persians
in the east. The Persians even seized Jerusalem
in 614 and Egypt
in 619. At the same time, he also faced domestic enemies who coveted the
throne. In general, Heraclius constantly conducted defensive and offensive wars,
in which he managed to trounce the Persians and Avars. However, Islam soon
replaced the Persian danger. Muslims occupied territories in Palestine which the emperor was unable to
recover. Heraclius was a great warrior and military man, who reorganized the
army and recaptured many of the lost territories of the empire. However, he
does not seem to have been an efficient governor and was unable to resolve the
religious controversies that arose during his reign.
The city:
Constantinople, the capital city of the Byzantine
Empire, was built on the site of the ancient Greek colony of Byzantium, on the
triangular peninsula formed by the Golden Horn,
the Bosporus and the Sea
of Marmara. This was an excellent location that controlled trade
routes linking the Aegean to the Black Sea. Emperor Constantine founded Constantinople
in 330 AD as a city to rival Rome
in splendour, wealth and power. The city grew fast, leading to problems of
space and facilities, so Theodosius I extended it to the west by building new
strong walls that protected Constantinople
until the end of the Byzantine Empire.
The
city was laid out after Rome.
A main road, the Mese Odos, linked the palace to the Golden
Gate. On this road was the Forum, a circular plaza with a statue
of Constantine
mounted on a column, surrounded by public buildings. Theodosius I and Arcadius later
built more forums decorated with their own statues.
Following
the Nika riots in the 6th century, Justinian adorned Constantinople
with magnificent edifices, palaces, baths and public buildings. This time also
saw the construction of Agia Sophia (the Holy Wisdom), the church which served
as the seat of the Ecumenical Patriarchate throughout the Byzantine period.
During
the 7th and 8th centuries Constantinople faced
major problems that threw it into disarray: attacks by the Avars (a siege in
674) and Arabs (attacks in 674 and 717-718); natural disasters (a powerful,
destructive earthquake in 740); and epidemics (plague in 747). Limited building
activity resumed in the 8th and 9th century, mainly concentrated on
strengthening the city's fortifications.
With
the recovery of the Byzantine Empire from the
9th to the 11th century, Constantinople became
the most populated city in Christendom; the majority of inhabitants were
Greek-speaking, but many other ethnic groups lived alongside them, such as
Jews, Armenians, Russians, Italians merchants, Arabs and mercenaries from Western Europe and Scandinavia. Many public, private and church-owned buildings were erected at the time, with
an emphasis on establishing charitable institutions such as hospitals, nursing
homes, orphanages and schools. Higher education flourished, thanks to the care
of the state and the emergence of important scholars. This renaissance lasted
until the mid-11th century, when economic problems due to poor management set
in, compounded by the adverse outcome of imperial operations beyond the borders.
The
Crusaders left Constantinople entirely
unscathed when first passing through, but in the Fourth Crusade of 1204 the
Franks conquered and ransacked the city, slaughtering those inhabitants they
did not take prisoner or drive out. In 1261 the city was retaken by Michael
VIII Palaeologus, who rebuilt most of the monuments and the walls but proved
unable to restore the city to its former splendour and glory. Enfeebled as it
was, the empire was incapable of checking the advance of the Ottomans, and in
1453 Constantinople finally fell into their
hands.
The fall signalled the end of the empire. Nevertheless, the Byzantine intellectual
tradition remained significant, as many scholars settled in the Venetian dominions
of Crete and the Peloponnese,
as well as in European countries, conveying Greek learning to the West.
Bibliography (3)
1. Ε. Νικολαϊδης, ‘Οι επιστήμες στο βυζάντιο. Η ιστορική παράδοση του Νεώτερου Ελληνισμού’ in Ιστορία και Φιλοσοφία των επιστημών στον Ελληνικό χώρο (17ος – 19ος αι.), Athens, 2003
2. Οι επιστήμες στον Ελληνικό χώρο, Institute of Historical Research, Department of Byzantine Research, Athens, 1997
3. The Occult Sciences in Byzantium, 2006
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