Buddha is unequivocally the main subject of Buddhist art
Vajra: Ritual scepter in a form of lightning
Prayer wheel: a cylinder that revolves around a central pole. Inside the cylinder are the pieces of papers inscribed with sacred phrases. The turning of the written prayers create a good karma.
Mandala: a sacred, cosmic diagram for meditation
Thangka: any painting on cloth with multitude of subjects, as Buddha, bodhisattvas, guardian deities
Mudras: Symbolic hand gestures, most famous one is the mudra of blessing
Prayer wheel: a cylinder that revolves around a central pole. Inside the cylinder are the pieces of papers inscribed with sacred phrases. The turning of the written prayers create a good karma.
Mandala: a sacred, cosmic diagram for meditation
Thangka: any painting on cloth with multitude of subjects, as Buddha, bodhisattvas, guardian deities
Mudras: Symbolic hand gestures, most famous one is the mudra of blessing
Buddha's life is very popular to depict
SOURCES:
http://images.locanto.in/1041754236/Buddha-Sculpture-India-Bronze-Statue-Shop-Chennai_1.jpg
http://farm8.static.flickr.com/7326/10688721054_a586b64d46.jpg
http://i.stack.imgur.com/m8QQK.jpg
http://f.tqn.com/y/buddhism/1/W/W/9/-/-/Departure_of_Siddhartha.jpg
http://prints.magic-photographer.com/img/s1/v54/p1216410920-3.jpg
https://s-media-cache-ak0.pinimg.com/736x/3a/d6/24/3ad624ef967205be8edf88c0d68151b4.jpg
https://upload.wikimedia.org/wikipedia/commons/0/0d/Buddha's_Nirvana.jpg
https://chasingaphrodite.files.wordpress.com/2015/01/acm-seated-buddha.jpg
https://s-media-cache-ak0.pinimg.com/736x/e0/e8/e0/e0e8e03129b3ac778d04e0c14c4696cd.jpg
http://www.buddhaweekly.com/wp-content/uploads/2014/10/Buddha-Weekly-dorje-gold-vajra-Buddhism.jpg
http://ecx.images-amazon.com/images/I/61cd9daieWL._SX450_.jpg
http://www.exoticindiaart.com/details/buddha/ts68.jpg
https://athensbuddhistcenter.files.wordpress.com/2012/03/thekagyurefugetree.jpg
http://consumewithcare.org/wp-content/uploads/2015/06/ahimsa.jpeg
http://img.ffffound.com/static-data/assets/6/a1a758d8eb08af8dea87f3f95aa6d94fbd9c50ac_m.jpg
http://www.chinaculture.org/chineseway/images/attachement/jpg/site1/20130904/0023ae606f171390d61901.jpg
http://www.spiritofmaat.com/messages/oct1/photos_files/tibetan_nuns.jpg
https://www.eastcountyschools.org/images/China2010/Day7/7LingyinTempleLaughingBuddha.jpg
http://previews.123rf.com/images/tore/tore1209/tore120900066/15269106-Head-of-sandstone-buddha-in-the-bodhi-tree-roots-at-Mahathat-temple-Ayutthaya-Thailand-Stock-Photo.jpg
https://s-media-cache-ak0.pinimg.com/236x/a2/54/ab/a254ab5c95159dc79e94f820416a4862.jpg
World Religions Text book RST 61, MSMU
http://images.locanto.in/1041754236/Buddha-Sculpture-India-Bronze-Statue-Shop-Chennai_1.jpg
http://farm8.static.flickr.com/7326/10688721054_a586b64d46.jpg
http://i.stack.imgur.com/m8QQK.jpg
http://f.tqn.com/y/buddhism/1/W/W/9/-/-/Departure_of_Siddhartha.jpg
http://prints.magic-photographer.com/img/s1/v54/p1216410920-3.jpg
https://s-media-cache-ak0.pinimg.com/736x/3a/d6/24/3ad624ef967205be8edf88c0d68151b4.jpg
https://upload.wikimedia.org/wikipedia/commons/0/0d/Buddha's_Nirvana.jpg
https://chasingaphrodite.files.wordpress.com/2015/01/acm-seated-buddha.jpg
https://s-media-cache-ak0.pinimg.com/736x/e0/e8/e0/e0e8e03129b3ac778d04e0c14c4696cd.jpg
http://www.buddhaweekly.com/wp-content/uploads/2014/10/Buddha-Weekly-dorje-gold-vajra-Buddhism.jpg
http://ecx.images-amazon.com/images/I/61cd9daieWL._SX450_.jpg
http://www.exoticindiaart.com/details/buddha/ts68.jpg
https://athensbuddhistcenter.files.wordpress.com/2012/03/thekagyurefugetree.jpg
http://consumewithcare.org/wp-content/uploads/2015/06/ahimsa.jpeg
http://img.ffffound.com/static-data/assets/6/a1a758d8eb08af8dea87f3f95aa6d94fbd9c50ac_m.jpg
http://www.chinaculture.org/chineseway/images/attachement/jpg/site1/20130904/0023ae606f171390d61901.jpg
http://www.spiritofmaat.com/messages/oct1/photos_files/tibetan_nuns.jpg
https://www.eastcountyschools.org/images/China2010/Day7/7LingyinTempleLaughingBuddha.jpg
http://previews.123rf.com/images/tore/tore1209/tore120900066/15269106-Head-of-sandstone-buddha-in-the-bodhi-tree-roots-at-Mahathat-temple-Ayutthaya-Thailand-Stock-Photo.jpg
https://s-media-cache-ak0.pinimg.com/236x/a2/54/ab/a254ab5c95159dc79e94f820416a4862.jpg
World Religions Text book RST 61, MSMU