This is a prayer offering obeisances to the six Gosvāmīns, direct disciples of Lord Caitanya. Vande rūpa-sanātanau raghu-yugau. The six Gosvāmīns' names are Rūpa Gosvāmī, Sanātana Gosvāmī . . . vande rūpa-sanātana raghu-yugau. And there are two Raghus: one Raghunātha dāsa Gosvāmī and one Raghunātha Bhaṭṭa Gosvāmī.
According to whole Vedic system, there are four castes: brahmin, kṣatriyas, vaiśyas and śūdras. So this Raghunātha dāsa Gosvāmī belong to the . . . of course, a Vaiṣṇava is never śūdra, but in social standard they belonged to the kṣatriya or śūdra. Therefore he is named as dāsa Gosvāmī, Raghunātha dāsa Gosvāmī.
So the six Gosvāmīns . . .
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Vande rūpa-sanātanau raghu-yugau śrī-jīva-gopālakau. So Sanātana Gosvāmī, Rūpa Gosvāmī, and two Raghunātha Gosvāmī, and three, four, and then Jīva Gosvāmī and Gopāla Bhaṭṭa Gosvāmī. Six Gosvāmīs. Practically, Śrī Caitanya Mahāprabhu left behind Him that eight ślokas, Śikṣāṣṭaka, which you have seen. I have translated in my first volume of Śrīmad-Bhāgavatam.
On the basis of those eight verses, the Gosvāmīns wrote literatures, volumes of books. From Vṛndāvana they were dispatched after the disappearance of the Gosvāmīns. They left so many books, handwritten, that when they were dispatched it was a full cartload, a big cartload, you see. Just imagine how many books they wrote. They were great scholars, and many varieties of books of bhakti school, Kṛṣṇa consciousness, they wrote.