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Basai (as it was known) already had a Fort under the control of Bahadur Shah, the Sultan of Gujarat. It was a significant trading centre in the west coast for times immemorial. Portuguese, with a formidable Navy, were trying to possess Diu and were continuously attacking the coastal territories, inflicting great losses. Finally they overran the defences of Basai and procured the fort along with Bombay and other adjoining areas, under a treaty signed with the Sultan of Gujarat on 23rd December 1534. In the second half of the 16th century, they reconstructed the fort on a grand scale with 10 bastions and named it Baçaim. This fort became the Portuguese Head Quarters of Indian Operations. The entire town was within the fort walls. It was known for the splendor of it's buildings, palaces and for the beauty of it's churches.
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The importance of Baçaim was reduced due to Bombay getting transferred to the British under the famous wedding treaty of 1665 (Catherine Braganza of Portugal to Charles the Second of England). After the Portuguese rule of over 200 years the fort fell into the hands of Marathas. Chimaji Appa, younger brother of the Maratha ruler Baji Rao Peshwa, after a prolonged campaign defeated the Portuguese in May 1739 at a very heavy price - 12000 dead. The casualty on the Portuguese side was less than 1000. It was the magnanimity of the Marathas who allowed the portuguese to march out of the town honourably. However, all the Churches and buildings were destroyed. The Church bells were carried away as souvenirs and got installed at Bhimashankar, Naroshanker (Nasik) and at Asta Vinayaka temple, Ballaleshwar (Sudhagad - Raigad). Baji Rao II on his defeat at the hands of Yashwant Rao Holkar, took refuse in this very fort in 1801.The fort also got renamed as Bajipura or Bajipur. In December 1802 he signed the treaty of Bassein with the British, who in turn helped getting him reinstalled as Peshwa. Eventually the fort came under the British rule and got renamed as Bassein.
This is all about the history of the fort in brief. When we entered the gate from the boat jetty side, there was an eerie feeling. Despite being a Sunday, there were hardly any visitors. There was wild growth all around. Prominent among them were hundreds of date palms every where. We walked through the narrow path, amidst the ruined structures. Some of the façades, are very well decorated with carved stones. But there are some, which have lost their identity. There were some Churches in ruins, which are still recognizable. The roofing of one of them seemed like a barrel. Navigating ourselves through the undergrowth, we tried to explore as much as possible. Since the area being very wide, we could not venture into looking at many of the remains from close quarters. Perhaps the month of August was not very conducive for exploring the site. The fort as it is, suffers from gross neglect. No efforts appear to have been made for any kind of restoration. Elsewhere in the country, the ASI is doing a commendable job but when we look at Vasai, one can only cry in dismay.