The Colosseum - the greatest amphitheatre of the antiquity - was built in Rome , Italy , about 1920 years ago. It is considered an architectural and engineering wonder, and remains as a standing proof of both the grandeur and the cruelty of the Roman world.
After the splendour of imperial times, the Colosseum was abandoned, and in turn it became a fortress for the medieval clans of the city, a source of building materials, a picturesque scenery for painters, a place of Christian worship. Today it is a challenge for the archaeologists and a scenario for events and shows.
Roman Colosseum Commentary
The Colosseum or Flavian Amphitheater was begun by Vespasian, inaugurated by Titus in 80 A.D. and completed by Domitian. Located on marshy land between the Esquiline and Caelian Hills, it was the first permanent amphitheater to be built in Rome . Its monumental size and grandeur as well as its practical and efficient organization for producing spectacles and controlling the large crowds make it one of the great architectural monuments achieved by the ancient Romans.
The amphitheater is a vast ellipse with tiers of seating for 50,000 spectators around a central elliptical arena. Below the wooden arena floor, there was a complex set of rooms and passageways for wild beasts and other provisions for staging the spectacles. Eighty walls radiate from the arena and support vaults for passageways, stairways and the tiers of seats. At the outer edge circumferential arcades link each level and the stairways between levels.

The ruins of Machu Picchu , rediscovered in 1911 by Yale archaeologist Hiram Bingham, are one of the most beautiful and enigmatic ancient sites in the world. While the Inca people certainly used the Andean mountain top (9060 feet elevation), erecting many hundreds of stone structures from the early 1400's, legends and myths indicate that Machu Picchu (meaning ' Old Peak ' in the Quechua language) was revered as a sacred place from a far earlier time. Whatever its origins, the Inca turned the site into a small (5 square miles) but extraordinary city. Invisible from below and completely self-contained, surrounded by agricultural terraces sufficient to feed the population, and watered by natural springs, Machu Picchu seems to have been utilized by the Inca as a secret ceremonial city. Two thousand feet above the rumbling Urubamba river, the cloud shrouded ruins have palaces, baths, temples, storage rooms and some 150 houses, all in a remarkable state of preservation. These structures, carved from the gray granite of the mountain top are wonders of both architectural and aesthetic genius. Many of the building blocks weigh 50 tons or more yet are so precisely sculpted and fitted together with such exactitude that the mortarless joints will not permit the insertion of even a thin knife blade. Little is known of the social or religious use of the site during Inca times. The skeletal remains of ten females to one male had led to the casual assumption that the site may have been a sanctuary for the training of priestesses and /or brides for the Inca nobility. However, subsequent osteological examination of the bones revealed an equal number of male bones, thereby indicating that Machu Picchu was not exclusively a temple or dwelling place of women.
One of Machu Picchu 's primary functions was that of astronomical observatory. The Intihuatana stone (meaning 'Hitching Post of the Sun') has been shown to be a precise indicator of the date of the two equinoxes and other significant celestial periods. The Intihuatana (also called the Saywa or Sukhanka stone) is designed to hitch the sun at the two equinoxes, not at the solstice (as is stated in some tourist literature and new-age books). At midday on March 21st and September 21st, the sun stands almost directly above the pillar, creating no shadow at all. At this precise moment the sun "sits with all his might upon the pillar" and is for a moment "tied" to the rock. At these periods, the Incas held ceremonies at the stone in which they "tied the sun" to halt its northward movement in the sky. There is also an Intihuatana alignment with the December solstice (the summer solstice of the southern hemisphere), when at sunset the sun sinks behind Pumasillo (the Puma's claw), the most sacred mountain of the western Vilcabamba range, but the shrine itself is primarily equinoctial.
Shamanic legends say that when sensitive persons touch their foreheads to the stone, the Intihuatana opens one's vision to the spirit world (the author had such an experience, which is described in detail in Chapter one of Places of Peace and Power, on the web site, www.sacredsites.com). Intihuatana stones were the supremely sacred objects of the Inca people and were systematically searched for and destroyed by the Spaniards. When the Intihuatana stone was broken at an Inca shrine, the Inca believed that the deities of the place died or departed. The Spaniards never found Machu Picchu , even though they suspected its existence, thus the Intihuatana stone and its resident spirits remain in their original position. The mountain top sanctuary fell into disuse and was abandoned some forty years after the Spanish took Cuzco in 1533. Supply lines linking the many Inca social centers were disrupted and the great empire came to an end. The photograph shows the ruins of Machu Picchu in the foreground with the sacred peak of Wayna Picchu towering behind. Partway down the northern side of Wayna Picchu is the so-called " Temple of the Moon" inside a cavern. As with the ruins of Machu Picchu , there is no archaeological or iconographical evidence to substantiate the 'new-age' assumption that this cave was a goddess site.

Taj Mahal, the pinnacle of Mughal architecture, was built by the Mughal emperor Shah Jahan (1628-1658), grandson of Akbar the great, in the memory of his queen Arjumand Bano Begum, entitled ‘Mumtaz Mahal’. Mumtaz Mahal was a niece of empress Nur Jahan and granddaughter of Mirza Ghias Beg I’timad-ud-Daula, wazir of emperor Jehangir. She was born in 1593 and died in 1631, during the birth of her fourteenth child at Burhanpur. Her mortal remains were temporarily buried in the Zainabad garden. Six months later, her body was transferred to Agra to be finally enshrined in the crypt of the main tomb of the Taj Mahal. The Taj Mahal is the mausoleum of both Mumtaz Mahal and Shah Jahan.
The mausoleum is located on the right bank of the river Yamuna at a point where it takes a sharp turn and flows eastwards. Originally, the land where the Taj Mahal presently stands belonged to the Kachhwahas of Ajmer (Rajasthan). The land was acquired from them in lieu of four havelis as is testified by a court historian, Abdul Hamid Lahauri, in his work titled the Badshah-Namah and the firmans (royal decrees). For construction, a network of wells was laid along the river line to support the huge mausoleum buildings. Masons, stonecutters, inlayers, carvers, painters, calligraphers, dome-builders and other artisans were requisitioned from the whole of the empire and also from Central Asia and Iran . While bricks for internal constructions were locally prepared, white marble for external use in veneering work was obtained from Makrana in Rajasthan. Semi-precious stones for inlay ornamentation were brought from distant regions of India , Ceylon and Afghanistan . Red sandstone of different tints was requisitioned from the neighbouring quarries of Sikri, Dholpur, etc. It took 17 years for the monument complex to be completed in 1648.
In all, the Taj Mahal covers an area of 60 bighas, as the terrain gradually sloped from south to north, towards the river, in the form of descending terraces. At the southern point is the forecourt with the main gate in front and tombs of Akbarabadi Begum and Fatehpuri Begum, two other queens of Shah Jahan, on its south-east and south-west corners respectively called Saheli Burj 1 and 2.
On the second terrace is a spacious square garden, with side pavilions. It is divided into four quarters by broad shallow canals of water, with wide walkways and cypress avenues on the sides. The water channels and fountains are fed by overhead water tanks. These four quarters are further divided into the smaller quarters by broad causeways, so that the whole scheme is in a perfect char-bagh.

The main tomb of the Taj is basically square with chamfered corners. The minarets here are detached, facing the chamfered angles (corners) of the main tomb on the main plinth. Red sandstone mosque on the western, and Mehman-Khana on the eastern side of the tomb provides aesthetically a clear colour contrast.