The sacred map of Gelug begins with a small monastery on a mountainside northeast of Lhasa. In 1409, Tsongkhapa built Ganden Monastery there; over the six hundred years since, Gelug's centers spread along the Yarlung Tsangpo, the upper Yellow River, and the Hexi Corridor, all the way to the grasslands of Inner Mongolia and Mongolia itself.

These monasteries share one thing: they are, first of all, schools. Every great Gelug monastery has a college (dratsang) where monks study the Five Great Treatises and debate daily. So when you enter a Gelug monastery, what you often hear is not bells and drums but the rising and falling claps of the debate courtyard.

The following centers are where the Gelug transmission took root in the Land of Snows; each has its own dedicated article.

• Ganden (founded 1409) — built by Tsongkhapa himself; the cradle of Gelug; on Wangkur Mountain northeast of Lhasa.
• Drepung (founded 1416) — historically the largest monastery, once with over ten thousand monks; the mother monastery of the Dalai Lama.
• Sera (founded 1419) — renowned for debate; its debate courtyard remains a Lhasa attraction to this day.
• Tashilhunpo (founded 1447) — Shigatse; seat of the Panchen Erdeni.
• Kumbum (founded 1560) — Huangzhong, Qinghai; Tsongkhapa's birthplace; Gelug's center in Amdo.
• Labrang (founded 1709) — Xiahe, Gansu; the largest Gelug center in Amdo, known for its complete curriculum.
• Jokhang — Lhasa; though not Gelug-exclusive, the Great Prayer Festival is held here, the grandest annual event of Gelug.

Each opens into a full illustrated article:

Among all Gelug centers, Ganden, Drepung, and Sera together are called the "Three Great Monasteries of Lhasa," the hub of the whole school.

Ganden is Tsongkhapa's seat, on the slope of Wangkur Mountain about forty kilometers northeast of Lhasa, built into the mountain in tiers. It is the symbol of Gelug's doctrinal authority — the successive Ganden Tripa (throne-holders), Gelug's doctrinal leaders, are chosen for learning and virtue, not by reincarnation.

Drepung was historically the largest, with over ten thousand monks at its height, and is the mother monastery of the Dalai Lama. It is composed of several dratsang (colleges), each overseeing a number of khams tshan (basic units organized by the monks' home regions), forming a vast monastic structure.

Sera is famous for debate. Every afternoon, monks face off in pairs in the debate courtyard, clapping and pressing questions, the sound rising in waves. This training is the core of the Gelug curriculum, and Sera has preserved it most completely.

The three monasteries each have their role yet interpenetrate: monks may wander among them to study, and finally defend their thesis at the Great Prayer Festival. After 1959, the three were rebuilt in southern India (Karnataka), fully restoring the study-and-practice system.

A Gelug monastery follows a fixed layout, roughly as follows:

The great hall (འདུ་ཁང་, du khang) — where the community chants together; at the center are enshrined Śākyamuni, Tsongkhapa, or a deity, with protector chapels on either side. The hall is dim, heavy with the smell of butter lamps.

The debate courtyard (ཆོས་རྭ་, chöra) — usually a paved or sandy courtyard with trees. In the afternoon, monks debate in pairs.

The dratsang (གྲྭ་ཚང་, dratsang) — the college, the teaching unit of the monastery. Great monasteries often have several dratsang, each with its specialty (exoterics, tantra, medicine, Kālacakra, etc.).

The khams tshan (ཁམས་ཚན་, khams tshan) — the basic unit organized by the monks' home region, combining living and study management.

The printing house and scripture library — preserving woodblocks and canon; the monastery's "library."

The visitor's etiquette is simple: go slowly, keep quiet, do not point at statues with a finger, do not speak loudly or photograph inside the halls, and above all do not interrupt a debate. Monks in the courtyard are wholly concentrated; onlookers should keep their distance.

Gelug's annual festivals are its most public and broadly participatory religious events:

• The Great Prayer Festival (མོན་ལམ་ཆེན་མོ་, Monlam Chenmo) — in the first month of the Tibetan calendar, inaugurated by Tsongkhapa in 1409 at the Jokhang in Lhasa, lasting about two weeks, gathering Gelug monks from across Tibet to pray; the most important annual assembly.
• The Butter Lamp Festival (དགའ་ལྡན་ལྔ་མཆོད་, Ganden Ngamchö) — on the twenty-fifth of the tenth month, commemorating Tsongkhapa's passing; every household lights butter lamps on window sills, and the monasteries glow all night.
• The Yogurt Festival (ཞོ་སྟོན་, Shoton) — in the seventh month; originally a yogurt feast after the monks' summer retreat, later evolving into unveiling of thangkas and Tibetan opera, with Drepung's thangka unveiling most famous.
• The Debate Assembly — held periodically through the year at each monastery to test students' progress by debate.

These festivals repeatedly wake the monastery through the year: the Dharma is not preserved in scriptures, but enacted again and again.

Gelug's spread is a religious geography spanning Asia.

In the fifteenth century it took shape in the Lhasa valley; in the sixteenth, the Third Dalai Lama met the Mongol Altan Khan, and the transmission entered the Mongol grasslands; in the seventeenth, the Fifth Dalai Lama established the Ganden Phodrang regime, Gelug became the dominant force in Tibet, and spread east to Qinghai, Gansu, Sichuan, and Yunnan; in the eighteenth, the Qing court conferred titles on the Dalai and Panchen, and Gelug built monasteries across Inner and Outer Mongolia.

This route also explains the distribution of Gelug centers: the Three Great Monasteries of Lhasa are the core, Kumbum and Labrang are the eastward pivots, and the Mongol grasslands are the farther branches. Each monastery is a lit coordinate along this route.

After the twentieth century, Gelug spread with the Tibetan exile community to India, Nepal, and Bhutan, and entered Europe and America. Today in the rebuilt Ganden, Drepung, and Sera of India, monks still study the Five Great Treatises by the six-hundred-year-old curriculum — institutions outlast buildings.

The daily life of a Gelug monastery is roughly this:

Dawn — rise before light; the community gathers in the great hall for morning chanting (morning service), about two hours. The hall is dim, lit only by butter lamps; the chanting is low and continuous.

Morning — to one's dratsang for class or recitation. Recitation is the basic skill of Gelug; the verses of the *Abhisamayālaṃkāra* must be memorized until fluent, to be cited at will in debate.

Afternoon — debate. Monks face off in pairs, clapping and pressing; the liveliest period of the day.

Dusk — gather again to chant (evening service), or personal practice.

Night — self-study, copying scriptures, or reciting by butter-lamp light. The monastery is very quiet.

This life repeats three hundred and sixty-five days a year, for fifteen to twenty years.

This description may seem plain, yet it shows one thing: the six-hundred-year foundation of Gelug rests not on a genius's flash, but on thousands of monks repeating the same routine day after day.

Q: Which is the most important Gelug monastery?

A: Ganden Monastery, founded by Tsongkhapa himself—the cradle of Gelug and the seat of its doctrinal authority. Beyond it, Drepung, Sera, Tashilhunpo, Kumbum, and Labrang are all major seats.

Q: Can one still visit the three great monasteries today?

A: Yes. The three great monasteries of Lhasa are open to visitors, though some halls and the debate sessions have rules—follow the on-site guidance. The re-established monasteries in South India can also be visited.

Q: What are a 'dratsang' and a 'khamtsen'?

A: A dratsang is a college within a monastery (a teaching unit); a khamtsen is the grassroots residential organization divided by the monks' regions of origin. A great monastery is often composed of several dratsang and dozens of khamtsen.

Q: If I can't go to Tibet, how can I draw near these sacred sites?

A: Gelug equally values inner resonance. Reading The Great Treatise on the Stages of the Path, daily practice of renunciation and bodhicitta, and watching debate footage are all ways to connect with the lineage. The institutionalized study and practice itself is Gelug-style pilgrimage.

• Colourful Drepung Monastery.jpg · Stephen Anthony Rohan / CC BY-SA 4.0
• Lhasa-Drepung-32-Klostergebaeude-2014-gje.jpg · Gerd Eichmann / CC BY-SA 4.0
• Lhasa-Drepung-40-Tuermchen-2014-gje.jpg · Gerd Eichmann / CC BY-SA 4.0