Three Sacred Forms in Each Temple
Mūrtitrayam ('the three [deity] forms') describes the standard three sacred forms present in a properly consecrated Sri Vaishnava temple: (1) mūlavar (root/original deity) — the primary, permanently fixed deity of the innermost sanctum (garbhagṛha), believed to be svayambhū (self-manifested) or installed in primordial times; (2) utsava-mūrti (festival/processional deity) — the moveable image that is taken out in procession during festivals; (3) kautuka-bera (intimate/close form) — a smaller, more intimate form of the deity.
The Mūlavar: Immovable Presence
The mūlavar never moves from the garbhagṛha — it is the eternal, immovable divine presence at the center of the temple. Access to the mūlavar is limited; most devotees see it only through the doorway or from designated viewing positions. Its immovability symbolizes the Lord's permanent, unconditional presence at the kṣetra.
The Utsava-Mūrti: Accessible Presence
The utsava-mūrti is the mobile, accessible form — it comes out to the streets during festivals, receives garlands from devotees directly, and is seen in all its decorated splendor during processions. Namperumāḷ at Śrīraṅgam and the various forms at other Divya Desams are famous examples of beloved utsava-mūrtis.
Theological Significance
The mūrtitrayam reflects the Lord's accommodation of different kinds of devotional need: the awe-inspiring, immovable mūlavar for the experience of transcendence; the beloved, accessible utsava-mūrti for intimate encounter; and the kautuka-bera for continuous, close personal worship.