The purpose of this study is to analyze the overall condition of the foundation for the three storied stone pagoda of Bulguksa temple in GyeongJu. As a research method, exploration of the electrical resistivity, refraction seismic, surface wave exploration, GPR exploration, Reputation loading test. The results of the investigation, the range of the foundation was formed in foundation stone outskirts of 1.5 ∼ 2.0m. It was confirmed to be about 2.0m depth. The depth of the foundation becomes shallower from the base portion to the outside. And the bearing capacity of foundation was sufficient conditions to weight. It can sufficiently support the weight of pagoda. And, the result of this investigation becomes basis data for repair work.

The purpose of this study is to analyze the cause of damage to the three storied stone pagoda of Bulguksa temple in GyeongJu. This report is attempted to making reinforcement and conservation plan through investigating and analyzing the cause of damage to that. The damage is caused by occurring of stress, degrading of stone strength, changing of underground soil structure, natural disasters and so on. Compressive stress, shear stress, bending stress and lateral pressure affected to the pagoda since built up. Ultrasonic examination data tells the strength of the stone. According to this result, strength of the stereobate stone materials is enough to support the weight of the upper ones. But we could found many other factors of the damage could consider, for example the problems occurred on building the pagoda construction and the weakness of the stone material(soft rock). And many environmental factors being changed in soil structure(subsidence of soil and degradation of bearing power of soil and freezing and melting of soil) can be seen as the cause of the damage. Natural disasters like earthquake, lightning and heavy rain were also thought to give direct impact to the damage. At last Concentration of compressive stress caused the crack and exfoliation on the stone materials and shear stress, bending stress and lateral pressure were main causes of the stereobate stone materials shearing.

Seokgatap and Dabotap are representing the tower patterns in 「Gyeonbotappum」of the Lotus Sutra. It is very peculiar, for the description on 「Gyeonbotappum」is usually made in terms of 'the two Buddhas sitting side by side'. If 'the two Buddhas sitting side by side' is describing the situation in Dabotap, the double structure of Seokgatap and Dabotap can be said to symbolize the scriptural description in a different viewpoint. Its correct comprehension is pretty important in understanding Bulguksa. For this, this paper first arranged the critical minds and flows about the faith objects in Indian Buddhism. And, it was considered how these aspects were accumulated through Saddharma-puṇḍarīka sūtra. Secondly, it was considered why 「Gyeonbotappu m」took the typical symbolism in Saddharma-puṇḍarīka sūtra(Lotus Sutra). These parts should be necessarily considered in advance in that Seokgatap and Dabotap were derived from the form of 「Gyeonbotappum」. Based on this approach, the author checked the actual aspects of Seokgatap that the tower was built on a natural rock ground and the stones surrounding the tower are constituting the 8-directional Lotus site. With these two aspects, we could get the clue on the foundation time of Bulguksa that its founder had intended. In that Dabotap was formed on the basis of 「Gyeonbotappum」, the features of Dabotap is very important in comprehending its foundation viewpoint. As a result, the viewpoint of double towers in Bulguksa can be said to be the one that the world of suffering was to change to the Pure Land after Sakyamuni preached the Lotus Sutra on the top of Mt. Gṛdhrakūṭa and Prabhūtaratna-tathāgata proved it. This foundation viewpoint shows us clearly that 'the Lotus Buddhist Country' existed in parallel to the Avatamska Buddhist Country. It secures an appropriate meaning in that it can complement or adjust our understanding on the 'Buddhist country (Bulguk)' of Bulguksa where the Avatamska Idea is emphasized relatively highly as shown in the whole title of Bulguksa as 'Avatamska Bulguksa.'

The names of Seokgatab and Dabotab are almost generalized among the people along with Bulguksa the most well-known temple in Korea. But, despite this generalized situation, the names of Seokgatab and Dabotab have not secured the clear standpoint till now. It is because the names of Seokgatab and Dabotab can be found only in the 18C documents like <Bulguksa History> and <Ancient and Present Bulguksa>. More complicatedly, in the record of the Goryeo sarira case found during the dismantling of Seokgatab, the name of Seokgatab was 'Mugujeonggwangtab' or 'Seoseoktab'. This paper is to secure the nominal validity of Seokgatab and Dabotab to remove the confusion due to their names and to raise the efficiency of studies related with Bulguksa in the future. First, their names and the problems related with them were summarized in Chapter 2. Based on this critical consciousness, Chapter 3 deals with the tragedy of Asadal related with the creation of the stone pagodas and its symbolic re-interpretation. In this process, we can see that there could be a viewpoint of the great comprehension in them through the completion of 'the Buddhist Nation'. Then, the architectural features of Seokgatab and Dabotab were analyzed in the ritual view point of <Gyeonbotabpum>. Finally, in Chapter 4, on the basis that the viewpoint of one specific sect can not be predominantly applied in the construction of Buddhist land, it is held that Avatamsaka Idea and Saddharma-puṇḍarīka Idea can coexist without any conflict. It is shown in the fact that Seokgatab and Dabotab can make harmony together in the Avatamsaka Idea while keeping their names. With these efforts, we can clearly see that the peculiar titles of Seokgatab and Dabotab can be said to secure sufficient validity.