Conducts illegal archaeological excavations on the territory of the archaeological monument of national importance, the archaeological complex "Ancient City of Myrmecia" in Kerch during 2014-2019, 2021-2023 as part of the activities of the "Myrmecian Expedition of the State Hermitage Museum", which he heads.
In particular, under his control and guidance, during the activities of the relevant archaeological expedition in 2022, a treasure was discovered and seized in favour of the russian federation - 30 gold coins, of which 26 were inscribed with the name of Alexander the Great and 4 were minted during the reign of his brother Philip ΙΙΙ Arridaeus.
The Prosecutor's Office of the Autonomous Republic of Crimea and the city of Sevastopol served Butyagin with a notice of suspicion in absentia of illegal search operations at the archaeological heritage site.

Since 16 December 2021, she has been the so-called Minister of Culture of the Republic of Crimea. According to her official duties, Manezhina:
- implements the state targeted programmes of the russian federation, an element of which is the implementation of archaeological works in the territory of the Republic of Crimea, the illegal transfer of cultural property of Ukraine;
- Issues orders on approval of administrative regulations by the Ministry of Culture of the Republic of Crimea for the provision of state services on issuing permits for the development of protection zones for cultural heritage sites of the Republic of Crimea;
- provides and facilitates the issuance of permits (open letters) for scientists to conduct archaeological work in the territory of the Republic of Crimea,
- provides funding and other material and technical support for the activities of archaeologists,
- holds meetings and substantive discussions with young people on contemporary cultural and youth policy in the russian federation.
Since 2016, T.A. Manezhina has been holding regular meetings on issues related to archaeological research of objects of cultural significance, in particular, the ‘Complex of the fortress and cave city "Mangup-Kale".
In 2022, as part of a working trip, she visited the Scythian Naples Historical and Archaeological Museum-Reserve, emphasising the importance of the complex of works carried out to improve and adapt the "object of cultural heritage of federal significance" for modern use, create tourist infrastructure and comfortable conditions for visitors.
Manezhina regularly attends, organises and supervises exhibitions and other events, such as the Crimean Scientific Readings dedicated to the 100th anniversary of the Alupka Palace and Park Museum-Reserve in 2022.

The director of the Federal State Budgetary Institution of Science of the russian federation "Institute of Archeology of the RAS", which organises illegal archaeological excavations and provides financial support to numerous archaeological expeditions on the territory of the temporarily occupied Crimean peninsula.
It is known that from 2014 to 2023, the staff of the IA RAS on behalf of this organisation received more than 101 permits for archaeological work on the territory of the temporarily occupied Crimean peninsula. With the organisational and financial support of Makarov M.A., the Institute"s staff annually conducts a number of episodes of illegal archaeological work.
In particular, due to the activities of the so-called "New Construction Archaeological Expedition of the IA RAS" in 2017-2019, more than a hundred archaeological sites were destroyed or damaged during the construction of the so-called "Taurida Highway", and in 2022-2023, during the construction of the propaganda complex "New Chersonesos" with the participation of IA RAS employees, the cultural layer of the UNESCO monument "The Ancient City of Chersonesos and its Chora" was destroyed on an area of about 70 thousand m². m², and about 5 million items of Ukrainian cultural property were seized and moved.