The Satavahanas unified the Deccan and supported Buddhist stupas at Amaravati, Nagarjunakonda, and Nelakondapalli. The earliest layers of the Nelakondapalli complex date to the late Satavahana period (c. 2nd–3rd century CE). Its location near the Krishna River made it a convenient stop for merchants and monks travelling between western ports (Kalyan, Sopara) and eastern coastal regions (Dantapura, Amaravati). Punch‑marked Satavahana coins found at the site confirm economic activity.

The Ikshvakus (c. 225–340 CE) succeeded the Satavahanas and turned the Krishna valley into a vibrant Buddhist landscape. They established monastic universities at Nagarjunakonda (Vijayapuri) and at Nelakondapalli. The main stupa, the bronze Buddha statue, and the miniature limestone stupa are stylistically identical to those found at Nagarjunakonda, confirming contemporaneity. The Ikshvaku period saw the peak of Nelakondapalli as a major Buddhist centre.

The Mahastupa follows the classic Andhra‑type design: a circular drum (medhi) supporting a hemispherical dome (anda), crowned by a harmika and a yasti (central pillar). The stupa had a diameter of approximately 25–30 metres, making it one of the largest in Telangana. A pradakshinapatha (circumambulatory path) paved with lime concrete surrounded the drum. Four directional torana (gateway) bases have been found, indicating that the stupa once had an elaborate entrance similar to Sanchi.

Foundations of several viharas have been excavated – rectangular structures arranged around a central courtyard. Each vihara had a central assembly hall and rows of small monastic cells (kutis), typically 3 m × 3 m, with raised brick platforms for sleeping. The bricks used are large (35 cm × 25 cm × 7 cm) and well‑fired. A kitchen complex with large hearths and a granary suggests a monastic community of 200–300 monks.

A structural chaitya hall (prayer hall) was identified by its apsidal foundation and a raised platform that held a small stupa. Unlike rock‑cut chaityas, this was built of brick and limestone. The site also features a sophisticated water management system: cisterns (one large stepped tank measuring 10 m × 5 m × 3 m deep), brick‑lined wells, and terracotta pipes for water distribution – essential for sustaining a large monastic population and pilgrims.

The most spectacular find is a bronze idol of Lord Buddha, 30 cm tall, in the dharmachakra pravartana mudra (teaching pose). The serene expression, tightly curled hair, and robe folds are typical of the Amaravati school. A miniature limestone stupa (15 cm high) – a votive offering – replicates the Mahastupa’s dome, harmika, and umbrella. Both are now displayed in the site museum.

Hundreds of terracotta idols include Buddha, Bodhisattvas (Avalokiteshvara), and auspicious symbols (lotus, triratna, dharma chakra). A rare limestone panel depicting a stupa worship scene shows devotees, elephants, and floral motifs – a direct parallel to the reliefs from the great stupa of Amaravati. Punch‑marked Satavahana coins and a few lead Ikshvaku coins were also recovered.

The entire complex – stupa, viharas, residential areas – is encircled by a mud fortification wall covering 100 acres. The wall was built using the rammed earth technique, with a base width of up to 4 metres and surviving height of 2–3 metres. This wall served both defensive purposes (protection from raids) and flood control. The presence of such a large enclosure suggests that Nelakondapalli was a pilgrimage‑cum‑urban centre where lay devotees, artisans, and merchants lived alongside the monastic community.

Advanced water harvesting features include a large stepped cistern fed by surface runoff, brick‑lined wells, and underground drainage channels. These ensured year‑round water availability and hygienic disposal of waste – evidence of sophisticated civic planning in the 3rd–4th century CE.

A memorial building, the Bhakta Ramadasu Dhyana Mandiram, was constructed at his birthplace in 1955 and is managed by the Sri Seeteramachandra Swamy Devastanam, Bhadrachalam, since 1983. The Sri Bhaktha Ramadas memorial festival is organised annually between 28 April and 2 May, attracting devotees from across Telangana. Sri Ramanavami is also celebrated with pomp. The site now contains three Shiva temples and two Vaishnava temples (including a Rama temple), illustrating the continuity of worship from Buddhism to Hinduism over 1,500 years.

Within 1.5 km of Nelakondapalli are two mounds associated with the Mahabharata: Virataraju Dibba (said to be the palace of King Virata) and Keechaka Gundam (a tank where Keechaka was killed). These sites are of local legendary importance and add to the area's historical allure.