Schreiber-Bogen Card modeling Leaning Tower of Pisa
Leaning Tower of Pisa
to cut colored model and stick together!
Material: paper, cardboard
Number of sheets: 6.5
Scale: 1: 160
Additionally necessary: paper scissors, glue
Helpful tools: scalpel, bone folder, small clamps and needles for fixing
The manufacturer classifies his models in five levels of difficulty one:
"Children Model": very light and with childlike motifs
"0": beginners model
Historical to Leaning Tower of Pisa
The Leaning Tower belongs to an ensemble of cathedral tower, baptistery and cemetery in the Tuscan city of Pisa. The ensemble UNESCO declared in 1987 a World Heritage Site. The tower itself was intended as a bell tower for the neighboring cathedral. With its round shape, colonnades on all floors and the originally planned height of 100 meters, it should be clearly distinguished from other towers in Italy, demonstrating the wealth and power of the medieval city-state of Pisa. According to legend, Galileo Galilei conducted on the tower studies to case laws.
When 1173 started construction, there were significant complications. The foundation sagged the third floor after completion. The building fell into difficulties. Then, the construction had to be stopped. Only 100 years later they took the work back on and put the other floors of the tower at an angle to the slope compensate. But the foundation sagged further. Due to further interruptions of the complex was finished in 200 years after construction began. It was too risky to build the tower in the planned height. He is now about 54 feet high. As building 14,200 tons were used white marble. Above, the tower bells while, but were allowed to temporarily not ring because of the danger of collapse. About the inclination angle there are different specifications. When the visit to the tower because of difficulties too dangerous, was the city of Pisa had to close for visitors its landmark in January 1990th
Extensive renovations during the closure prevented the possible collapse. On the second floor was built in May 1992 steel tires. In the foundation on the north side 600 tons of lead were admitted as a counterweight in July 1993 addition. Thus, the inclination about 1 cm decreased. By a ground freezing and a steel cable anchorage in 1995 reinforced the inclination something. Then you complained the north side of 900 tons of lead. In autumn 1997 there was a strong earthquake in the region. To prevent damage from further quakes began in 1998 with the so-called soil extraction method: With holes at the bottom of the north side of 50 cubic meters of material were removed. The foundation sagged, and the tower straightened. Sun managed to reopen in December 2001 a gradual erection by 44 cm. Allegedly, the backup should now hold for the next 300 years the tower.
During renovation, archaeologists found an old Roman road and a medieval grave with complete skeleton. Recent excavations show that the tower stands at the edge of an ancient silted harbor basin. Probably one of the reasons for the sagging of the foundation. Restoration work on the facade of the tower were over 24,000 stone blocks of marble from air pollution, pigeon droppings and graffiti cleaned and restored ornaments.
The closure of the tower had led throughout Tuscany to protests because they feared a significant drop in tourist arrivals. But the tower also was a magnet for visitors during the twelve-year restructuring phase. The interest of tourists mainly applies to the imbalance of the tower. The Romanesque architecture and Byzantine influence in the design play a lesser role in most tourists. The Leaning Tower is an important economic factor for the city of Pisa. Often you can therefore hear: "Be imbalance must the tower, but he must not fall."