forts include Bekal Fort, Arikady fort, Chandragiri fort, Hosdurg Fort, Palakkad Fort, Thalassery Fort, Fortaleza da São Tomé, Fort Kochi, St Thomas Fort, East Fort and Anchuthengu Fort. Notable palaces include Padmanabhapuram Palace, Kanakakkunnu Palace, Kowdiar Palace, Mattancherry Palace, Arakkal Palace, Shakthan Thampuran Palace, Hill Palace etc. The Malabar Coast is also home to some of the oldest temples, oldest mosques, oldest churches, and oldest synagogues in South Asia. The historic trading food streets in Kerala include the S. M. Street (Sweetmeat street) at Kozhikode. Mappila Bay harbour at Kannur is home to both fort and palace. Thalassery Cuisine, a traditional style of cuisine originated in Northern Kerala due to its historical trade relations, also attracts tourists. Events Festivals The major festival in Kerala is Onam. Kerala has also a number of religious festivals. Thrissur Pooram, Attukal Pongala, Beema Palli Uroos, and Chettikulangara Bharani are the major temple festivals in Kerala. The Thrissur Pooram is conducted at the Vadakumnathan temple, Thrissur. The Sivarathri is also an important festival in Kerala. Aluva Sivarathri festival is the most famous festival related to Sivaratri. Festivals like Christmas and Easter are observed by the Christians. Parumala Perunnal, Manarkadu, Arthunkal, Thumpoly , Edathua Perunnal are the other regional festivals of Christians. Eid al-Fitr and Eid al-Adha are celebrated by the Muslim community. The annual festival Thirayattam is conducted in the village shrine of the south Malabar region in Kerala. Kochi-Muziris Biennale Kochi-Muziris Biennale is the largest art exhibition in the country and the biggest contemporary art festival in Asia conducted every year in the city of Kochi. The first Biennale in India was conducted in Kochi from 12 December 2012 till 13 March 2013. Medical tourism Medical tourism, promoted by traditional systems of medicine like Ayurveda and Siddha, is widely popular in the state, and draws increasing numbers of tourists. Kerala is popularly known as hub of Ayurveda. The medical tourism segment of Kerala is known for its reputation. Culture Kerala's culture is mainly Hindu in origin, deriving from a greater Tamil-heritage region known as Tamilakam. Later, Kerala's culture was elaborated on through centuries of contact with overseas cultures. Native performing arts include koodiyattom, kathakali—from katha ("story") and kali ("play")—and its offshoot Kerala Natanam, koothu (akin to stand-up comedy), mohiniaattam ("dance of the enchantress"), thullal, padayani, thirayattam, and theyyam. Other arts are more religion- and tribal-themed. These include chavittu nadakom, oppana (originally from Malabar), which