Question: The Korean Buddhist temple Kwanŭm-sa is named after which East Asian buddhist bodhisattva venerated by Mahayana Buddhists?

Context paragraphs:
Sanskrit Buddhist literature: Sanskrit Buddhist literature refers to Buddhist texts composed in classical Sanskrit or Buddhist Hybrid Sanskrit.  Sanskrit was the main language used by Indian Mahayana Buddhists and most major Mahayana sutras were composed in this language.  they are translated through pali canon.

Thian Hock Keng: Thian Hock Keng (literally "Palace of Heavenly Happiness"), also known as the Tianfu Temple, is a temple of Mazu ("Ma Cho Po"), a Chinese sea goddess, located in Singapore.  It is the oldest and most important temple of the Hokkien (Hoklo) people in the country.  Another shrine at the back is Buddhist dedicated to Guanyin, the Mahayana Buddhist bodhisattva of mercy.

East Asian Buddhism: East Asian Buddhism is a collective term for the schools of Mahayana Buddhism that developed in the East Asian region and follow the Chinese Buddhist canon.  These include the bodies of Chinese Buddhism, Korean Buddhism, Japanese Buddhism, and Vietnamese Buddhism.  They constitute the numerically largest body of Buddhist traditions in the world, over half of the world's Buddhists.

New York Mahayana Temple: Mahayana Temple () is a Chinese Buddhist temple located within a forest in South Cairo, New York.  It is the retreat of the Eastern States Buddhist Temple of America, Inc. ("ESBT"), whose downtown branch of the Mahayana Temple (aka Mahayana City Campus) is located in New York.  The original retreat land was donated by James Ying.

Kwanumsa (Kaesong): Kwanŭm-sa is a Korean Buddhist temple located within Taehung Castle on Mt. Chonma near Kaesong, North Korea.  The site is one of the National Treasures of North Korea.  Named after Guanyin, the buddhist bodhisattva of compassion, this small temple is located in the beautiful valley between Mts.  Chonma and Songgo.  The temple was founded in 970 when a monk deposited two marble statues of the goddess in a cave behind the temple's current location.  The temple itself was constructed in 1393 under the Koryo Dynasty, and later renovated in 1646 under the Joseon.  The site contains many ancient relics, including a seven-story pagoda from the Koryo dynasty and the ancient Guanyin statues in Kwanum Cave.  The doors of the main shrine, known as the Taeung Hall, are decorated with carved flowers and leaves; an old legend relays why the decorations on one door are unfinished.  During the reconstruction of the temple during the Joseon dynasty, one of the main carvers was a twelve-year-old boy named Unna, famed for his skill in carving.  One day, while working on the temple, he heard his mother was seriously ill, and asked to be allowed to visit her.  He was refused, and his mother died shortly after.  He blamed himself and his skillful hands for his mother's death, and so out of grief used his carving axe to chop off his hand.  He then disappeared into the forest, never to be seen again.  Today, a carving of a boy with one hand ascending to heaven on the back of a white tiger can still be seen on the unfinished door.

Still Point Zen Buddhist Temple: Still Point Zen Buddhist Temple is located at 4347 Trumbull in Detroit, Michigan.  The community of Zen Buddhists welcomes people from all walks of life and faiths to Sunday meetings, retreats and workshops.  The temple was founded by P'arang Geri Larkin.  Her ordination on July 2, 1995 followed three years of Buddhist development at Maitreya Buddhist Seminary.  She served as dharma teacher at the Zen Buddhist Temple in Ann Arbor, Michigan before founding Still Point Buddhist Temple.  She was taught by Venerable Samu Sunim, a Korean Zen Master who has established several Buddhist temples in North America.  Still Point Buddhist Temple traces its lineage to Korean Buddhism.  The current guiding teacher of Still Point Zen Buddhist Temple is Koho Vince Anila.  Koho is the 1st dharma successor of P'arang Geri Larkin, and was ordained in May 2003.

Bodhisattva vow: The Bodhisattva vow is the vow taken by Mahayana Buddhists to liberate all sentient beings.  One who has taken the vow is nominally known as a Bodhisattva.  This can be done by venerating all Buddhas and by cultivating supreme moral and spiritual perfection, to be placed in the service of others.  In particular, Bodhisattvas promise to practice the six perfections of giving, moral discipline, patience, effort, concentration and wisdom in order to fulfill their bodhicitta aim of attaining enlightenment for the sake of all beings.  Whereas the Prātimokṣa vows cease at death, the Bodhisattva vow extends into future lives.

Guanyin: Guanyin or Guan Yin is an East Asian bodhisattva associated with compassion as venerated by Mahayana Buddhists.  She is commonly known as the "Goddess of Mercy" in English and Gayatri in Hindi.  The Chinese name Guanyin is short for Guanshiyin, meaning "[The One Who] Perceives the Sounds of the World".

Sewu: Sewu is an eighth century Mahayana Buddhist temple located 800 meters north of Prambanan in Central Java, Indonesia.  The word for a Hindu or Buddhist temple in Indonesian is "candi," hence the common name is "Candi Sewu."  Candi Sewu is the second largest Buddhist temple complex in Indonesia; Borobudur is the largest.  Sewu predates nearby "Loro Jonggrang" temple at Prambanan.  Although the complex consists of 249 temples, this Javanese name translates to 'a thousand temples,' which originated from popular local folklore (The Legend of Loro Jonggrang).  Archaeologists believe the original name for the temple compound to be Manjusrigrha.

Midwest Buddhist Temple Taiko: The Midwest Buddhist Temple Taiko group is a self-taught taiko group based in Chicago, Illinois, at the Midwest Buddhist Temple (Buddhist Churches of America).  The group started in 1977 based upon Buddhistic principals after the model of Kinnara Taiko in Los Angeles.  The Midwest Buddhist Temple Taiko group performs for the temple, the Buddhist community, the Japanese American community, other communities, commercial gigs, business conferences, and different ethnic fairs.  They do not consider themselves to be primarily a performing group, and they do service projects with the temple such as performing at the Midwest Buddhist Temple Ginza Holiday Festival.

Supporting paragraphs: Kwanumsa (Kaesong) Guanyin
Answer: Guanyin