The Chattarpur Temple, founded by Shree Durga Charnanuragi Baba Sant Nagpal Ji in 1974, is a spiritual haven in Delhi, encompassing profound historical, architectural, and cultural elements. The temple, dedicated to Maa Adya Katyayani, a revered form of Maa Durga, is known for its Chola-style architecture, marked by grand domes and intricate carvings in a striking white and pink palette. Originally named Shree Adya Katyayani Shaktipeeth Mandir, it's popularly referred to as Chattarpur Mandir. Significant celebrations such as Navratri, Mahashivratri, and Krishna Janmashtami are festively observed here. The temple serves as a vital community center, providing social services and promoting sustainability initiatives. Despite its lack of major renovations since its founder's death in 1988, the temple remains an aesthetically pleasing structure that annually attracts lakhs of devotees, highlighting its spiritual significance.

The Devalay legend centers around the Shree Adya Katyaini Shaktipeet and its founding by Baba Nagpal Ji, who constructed three temples—the Gauri Shankar Temple, Shree Laxmi Vinayak Temple, and Shree Adya Katyaini Temple—on a vast 28-hectare site, making it the second largest in Delhi after Akshardham. Dedicated to Maa Adya Katyaini, a form of Maa Durga, the temple opens exclusively during Navratri, drawing massive crowds of devotees seeking blessings. This period is marked by joyous festivities, with many reporting a palpable divine presence of the deity. The temple is a significant spiritual hub, attracting not only locals but also politicians, spiritual leaders, and international pilgrims. Celebrations extend to Mahashivratri, Krishna Janmashtami, and Guru Poornima, underscoring its importance in Hindu religious traditions.

The temple, originally known as Shree Adya Katyayani Shaktipeeth Mandir, is dedicated to Maa Adya Katyayani, a form of Maa Durga or Shakti, revered as the sixth manifestation in the Navadurga tradition. The name encompasses significant etymology: "Adya" signifies the primal form, "Katyayani" implies omnipresence, and "Shaktipeeth" denotes a sacred site of divine feminine power with devotees experiencing the presence of the goddess. Over time, it has become popularly known as Chattarpur Mandir in Delhi. The temple's name and its evolution reflect both its religious significance as a hub of worship for the energy and essence of Shakti and its cultural prominence in the region.

The Devalay Temple, established by Shree Durga Charnanuragi Baba Sant Nagpal Ji in 1974, has become a significant spiritual and cultural hub in Delhi. Built under the guidance of its founder until his death in 1988, the temple features no major renovations and remains a large and aesthetically pleasing structure. On 10th July 2022, a gold-adorned statue of Shree Adya Katyaini Shaktipeet was installed, marking a key milestone. Celebrations like Navratri, Mahashivratri, and Krishna Janmashtami are observed lavishly. The temple's road was named “Maa Adya Katyaini Marg” on 16th February 2017. While lacking explicit historical artifacts, the temple houses old idols and artworks. It plays a vital role in the community by hosting bhandaras, providing clothing to saints, and supporting healthcare, rainwater harvesting initiatives, and government schemes. The temple attracts lakhs of devotees, highlighting its spiritual significance.

The Devalay's architecture prominently features the ancient Chola style, reflecting traditional religious beliefs. Central to its design is the Maa Adya Katyaini Shaktipeet temple, distinguished by its imposing domes and intricate carvings, along with a striking white and pink color scheme. This architectural marvel blends various styles, showcasing the grandeur of Chola architecture. The construction employs a diverse range of materials, including white and black marble, white stones, and concrete, alongside metals such as silver, copper, and iron. The deities are adorned with gold, adding an element of opulence. This combination of materials and styles not only enhances the temple's aesthetic appeal but also resonates with the religious practices and beliefs of its followers.