In pictures: Monks in commercial Bangkok
But the temple is now sandwiched between the city's newest shopping centre, Siam Paragon, and the construction site of another huge complex, Central World. In front of it, cars and buses fume down a six-lane highway, underneath the city's main rail link.
Here assistant abbot Phra Kru Sri Wisankun describes how the monks live, renouncing worldly values yet living next to Gucci and Starbucks.
"It was built by King Rama IV almost 150 years ago, near the site of the old palace. There were no other buildings - it was surrounded by rice fields. At first people would come here by boat along the canal."
"We still get up at about 5am for alms-giving, but the shops don't close until 10pm and there is always a lot of traffic, so the noise goes on until late into the night. We have to rest when we can.
"Especially at the beginning, some of the novices were interested in things going on outside the temple. It's hard for them, in this environment. But I always encourage them not to focus on material things."
"This temple is now very well-known, and many more people come to visit before or after shopping. We usually get more than 500 visitors a day.
"We've also had more donations so we can improve our buildings."
"We teach people the things that are important. Modern life is very active and competitive. Sometimes people have no rest and their minds never relax. You cannot live like this all the time."
"There were also a lot of problems with the temple buildings, as a result of all the digging. The floor subsided right under these Buddhist statues. Another time, our toilet system completely collapsed.
"But the construction companies have been very nice to us. They've always offered to repair any damages."
"In order to build the mall, they had to cover up a pond which was full of snakes and fish. So the construction company asked us to build this for the god of snakes, so they could finish the project safely."
"People may have money, but they'll always want more. Real life is not about money - even millionaires are still suffering."
"I just have these robes, I don't eat much and I do a lot of meditation.
"I like being a monk. I wouldn't want to live like other people I see going past. I'll be a monk forever."
Interview by Kate McGeown