Who is Lord Shiva in Prambanan ?

When I read Yogisvara Ramayana,
there are some words that
interested me so much. This is
from the scene of Mother Sita
entering the pyre. Lord Siva came
to that place and said, “Sang
Rama-inujaran winarah ryyawak
niran Devata| He Narayana He
Raghuttama taman bhede
kawaktat hidep| The revered Lord
(Siva) told Sri Rama about His real
identity as Supreme Divinity, as
He said, Hail Narayana, Hail
Raghuttama, Our two Selves were
not different.” By this word
taman-bhede (no difference)
suddenly remembered me about
my whole faith to Lord Siva, as we
hold in Goudiya Vaishnava
Sampradaya. And there’s no
better person who can describe
Lord Siva perfectly other than his
dear most Srila Sanatana Gosvamipada. To have
clearer image about Lord Siva of Prambanan, we
should read these passages from Srila Sanatana
Gosvami’s Brihad-bhagavatamrita 1.3 :
57. “He is the giver of both material pleasure and
liberation, and he increases bhagavadbhakti.
He is worshipful to even the liberated souls and he
is dear to the Vaishnavas.”
Our Lord Siva of Prambanan Temple was installed
by the most benevolent king of Java, who named
his kingdom as Mataram, the mother-land that
filled by devotion to Lord Rama, and intended to
become Ram-rajya. By his love to his subjects, the
king invited Lord Siva to come to his kingdom and
blessed his peoples with both material pleasure
and liberation. By the grace of our Mula-guru
Agasthiya, many liberated sages came to
Nusantara, they established Vedic culture
everywhere and Lord Siva is their worshipful
spiritual master. He is the dearest one to
Vaishnavas, because he increases their bhakti
toward Bhagavan Sri Krishna. This great Lord Siva
was worshipped in Java as their most revered
master. The beloved personality of everyone,
regardless his faith to any form of worship.
Here are more elaborations of the word taman-
bhede in Yogisvara Ramayana:
58–9. “Being overpowered by the bhakti of his
friend Kuvera, he has come from his own abode of
Sivaloka, which is perfectly suitable for him and
which is attained by those who perform bhakti
knowing there to be no difference between Sri Siva
and Sri Krishna, and accompanied by his beloved
Sri parvati and his other principal associates, he is
now going to adorn Kailasha Mountain with his
presence.”

60. Sri Gopa-kumara said: Hearing this, I was
overjoyed and I desired to attain some special
mercy from the very heart of that Mahesvara.
61–2. Knowing this, Sri Siva gave an indication
with his eyes to the exalted Nandisvara, who then
gave me pure instructions by which I easily
understood that Sri Siva is non different from and
increases one’s prema for my own worshipful
deity, Sri Madanagopala.
63. Then I cheerfully joined his associates, who all
delighted me. Then Sri Nandisvara began
describing Sri Siva extraordinary virtues, saying:
64. “In his one manifest form Sri Siva always
resides in his own abode above this Muktiloka (the
realm of impersonal liberation) where his
exclusive, beloved devotees always receive his
darsana.”
65. “Sri Siva always delights his devotees by
exhibitions of dancing and singing in his devotion
for Sri Bhagavån, from whom he is non-different.”
66. “Although he is Jagadishvara himself, as if he
were a servant he lovingly worships the thousand-
hooded Sri Sesha.”
By his mala, he chanted the divine name of Lord
Rama, while meditating on his own Supersoul,
Lord Sankarshana. He whipped out any unwanted
things from the heart of all peoples who came to
worship him by his camara and by the same he
also rendered devotional service toward his
beloved Lord Sankarshana. He bestowed
fearlessness to everyone and he also a divine master
who taught us the real knowledge, the path of
pure devotion. This is our Lord Siva of
Prambanan.
These verses were expressions of Vaishnava’s heart
and these came from special mercy from the very
heart of that Mahesvara Siva:
67. O bråhmana, although I was pleased to hear
that Sivaloka was superior to all other worlds, still
I felt some dissatisfaction in my heart.
68–9. Previously I could not discern the cause of
my own despondency, but then, by the mercy of
my gurudeva and the power of chanting my
mantra, I quickly understood that I was suffering
because I was not directly experiencing the glories
and pastimes of the lotus feet of Sri
Madanagopåla.
70. Then I told my mind that it is this same Sri
Siva who assumes the special form of Sri Krishna
and performs such wonderful, variegated
pastimes.
71–2. Seeing that my mind was not satisfied with
this, I said, “O mind, although with Sri Siva you
cannot experience that kind of pastime’s
sweetnesses, still, by his mercy, all of your long-
cherished desires will soon be completely fulfilled.”
So Lord Siva of Prambanan was worshipable to
everyone. The benevolent Raja and Rishis of
Mataram, installed his worship in the main shrine
of royal temple and distributed his mercy without
discrimination to all the peoples. They know the
real tattvas. They didn’t trap their selves in fanatic
and erroneous mundane conceptions of so called
Vaishnavas, Saivas, etc.