Trimontium Underpass

A competition for transformation and revitalisation

The Competition

Plovdiv Municipality announces a competition for a conceptual architectural and urban design solution for the complete transformation and revitalisation of the Trimontium underpass. This key urban zone is one of the busiest traffic and pedestrian arteries in the heart of the city. Its strategic location makes it a calling card for Plovdiv, yet its present condition falls short of the high aesthetic and functional standards called for by the cultural and historical significance of the site.

The competition calls for a solution that turns the underpass from a purely transitory space into a significant urban destination and a cultural focal point.

Awards

1st Prize: €15,000 (fifteen thousand euros), together with the prospect of a subsequent commission for the technical and detailed design, awarded through a negotiated procedure without prior publication under Art. 79 (1) (13) of the Public Procurement Act, subject to the applicable Bulgarian legislation and to secured funding.

2nd Prize: €8,000 (eight thousand euros).

3rd Prize: €5,000 (five thousand euros).

Two honourable mentions of €1,000 (one thousand euros) each, at the jury's discretion.

Schedule

21 August 2026 (Friday) - competition announced.

21 October 2026, 17:00(GMT+3) (Wednesday) - DEADLINE for submission of entries.

22 – 27 October 2026 - technical committee review.

28 October 2026 - entries made available to the jury.

2 – 6 November 2026 - jury session (evaluation).

9 November 2026 (Monday) - official announcement of the winners.

10 – 15 December 2026 - exhibition of all entries and public discussion with the finalists.

The Trimontium underpass, set in the heart of the city at the crossroads of the main traffic and pedestrian flows, is more than a piece of infrastructure. It is a key element of this vision and must be transformed so that it works as a powerful cultural gateway — one that not only presents the city's rich historical heritage but also lastingly establishes Plovdiv on the international stage as a leading centre of world cultural heritage.

Documentation

Link to the electronic public procurement
Source material
Architectural survey - plan liminal-plan-siteplan.dwg
Architectural survey - underpass plan liminal-plan-underpass.dwg
Architectural survey - vertical section liminal-section.dwg
Geodetic survey liminal-geo.dwg
Geodetic survey - list of points liminal-geopts.txt
Orthophoto image liminal-ortho.tif
Extract from the Ancient Forum of Philippopolis project by arch. V. Petkova AFF-0-SIT.pdf
AFF-1-DETAIL.pdf
AFF-2-DETAIL.pdf
Documents
Site plan of the underground infrastructure DOC-1.pdf
Extract from the Regulation Plan, Central Urban Area 2023, plots 521.1382+523.4022 DOC-2.pdf
Minutes No. 5 of the NCPCM of 22.05.2000 - IZFTP DOC-3.pdf
Drawing No. 1 to Minutes No. 5 DOC-4.pdf
Drawing No. 2 to Minutes No. 5 DOC-5.pdf
Budget value template budget.xlsx

The site of the underpass is of exceptional archaeological and cultural value, lying directly within the boundaries of the historical zone „Philippopolis – Trimontium – Plovdiv“. It forms an integral part of a group archaeological and architectural monument of culture of national significance. Its immediate proximity to the ancient Forum complex of Philippopolis, together with the archaeological structures within the underpass itself, calls for an exceptionally sensitive and responsible approach to any intervention.

Assessment

The competition is an open, international, single-stage, anonymous architectural competition for a conceptual design.

Entries are assessed by an independent jury made up of an odd number of members.

The jury will assess entries on the basis of a comprehensive analysis, giving priority to the quality of the architectural environment and to the treatment of the architectural heritage.

Composition of the jury

Chair: Plamen Panov – Deputy Mayor for Culture, Archaeology and Tourism, Plovdiv Municipality.

Member: Arch. Chavdar Tenev – Chair of the Regional Chamber of the Chamber of Architects in Bulgaria (CAB), Plovdiv.

Member: Arch. Ilko Nikolov – member of the Union of Architects in Bulgaria (UAB), Plovdiv Branch.

Member: Arch. Alis Ismailova – architect holding full professional design qualification, listed under Art. 165 of the Cultural Heritage Act.

Member: Landscape Arch. Stanimir Shalamanov – Chair of the Union of Landscape Architects (ULA), Plovdiv Branch.

Member: Arch. Petko Prokopiev – Chief Architect of Trakia District.

Member: Eng. Emil Boychev – Chair of the Regional Professional Council “Construction Supervision” (RPC “CSS”) at the Chamber of Engineers in Investment Design (CEID).

Reserve member: Arch. Nina Toleva-Novak – Deputy Director of the Municipal Institute “Old Plovdiv”.

Reserve member: Archaeologist Chief Assist. Prof. Desislava Davidova – expert at the Archaeological Museum, Plovdiv.

Jury

Plamen Panov Chair
Plamen Panov

Deputy Mayor for Culture, Archaeology and Tourism, Plovdiv Municipality

Biography

Plamen Panov is Deputy Mayor of Plovdiv Municipality for Culture, Archaeology and Tourism, serving his second consecutive term in this portfolio. His career includes work at Plovdiv Municipality and the Ministry of Culture in the fields of European programmes, international cooperation and cultural policy. He was part of the team that presented Plovdiv’s candidacy for European Capital of Culture 2019. During his time overseeing culture, a number of key projects for Plovdiv in cultural infrastructure and heritage conservation have been developed. These include the restoration and new functional development of Kino Kosmos; the landscaping, conservation, restoration and public presentation of the “Ancient Forum of Philippopolis – East and South”; the exhibition and restoration of Nebet Tepe and the ancient complex of the Eastern Gate, part of the large-scale project “Along the Fortress Walls of Philippopolis”; and other initiatives for the revitalisation and restoration of cultural heritage sites and museum infrastructure. He has also been actively involved in the initiative for the future of the former Bulgarian National Bank building in Plovdiv – the international concept competition “Vault of Ideas”, which received 42 proposals from 16 countries. His professional work focuses on the development of cultural infrastructure, the conservation and public presentation of cultural heritage, and establishing Plovdiv as an international cultural and tourist destination.

Arch. Chavdar Tenev Member
Arch. Chavdar Tenev

Chair of the Regional Chamber of the Chamber of Architects in Bulgaria (CAB), Plovdiv

Biography

Arch. Chavdar Tenev is Chair of the Plovdiv Regional Chamber of the Chamber of Architects in Bulgaria. He graduated in architecture from VIAS (today UACEG) and specialised at the School for Advanced Architectural Mastery. He has long experience in both design and administration, including as Deputy Mayor and Chief Architect of Zapaden District and Mayor of Tsentralen District in Plovdiv. He is the author and lead designer of award-winning architectural projects and takes an active part in the professional debate on the development and planning of Plovdiv.

Arch. Ilko Nikolov Member
Arch. Ilko Nikolov

Union of Architects in Bulgaria (UAB), Plovdiv Branch

Biography

Arch. Ilko Nikolov is a Plovdiv architect with long professional and public experience. He graduated in architecture from VIAS and has held leading positions in the Union of Architects in Bulgaria, including Chair of the Plovdiv Branch and Deputy Chair of the UAB. He has served on expert and advisory bodies on spatial planning in Plovdiv. Among his award-winning works is the new passenger terminal of Plovdiv Airport, for which he received the “Plovdiv” Architecture Award in 2009.

Arch. Alis Ismailova Member
Arch. Alis Ismailova

Architect with full design qualification, listed under Art. 165 of the Cultural Heritage Act

Biography

Arch. Alis Ismailova is an architect with full professional design qualification and a specialist in immovable cultural heritage, listed under Art. 165 of the Cultural Heritage Act. On the jury, her expertise lies in assessing how the competition entries relate to cultural values, the historic environment and the requirements for its protection.

Landscape Arch. Stanimir Shalamanov Member
Landscape Arch. Stanimir Shalamanov

Union of Landscape Architects (ULA), Plovdiv Branch

Biography

Landscape Arch. Stanimir Shalamanov is a practising landscape architect and a representative of Plovdiv’s professional community. He is a member of the Managing Board of the Union of Landscape Architects in Bulgaria and represents the Union’s regional branch in Plovdiv. His professional work is also connected with the Agricultural University of Plovdiv, where he is part of the Faculty of Viticulture and Horticulture. On the jury he provides specialist expertise in landscape architecture, planting and the quality of the urban environment.

Arch. Petko Prokopiev Member
Arch. Petko Prokopiev

Chief Architect of Trakia District, Plovdiv Municipality

Biography

Arch. Petko Prokopiev is Director of the “Spatial Planning and Technical Infrastructure” Directorate and Chief Architect of Trakia District, Plovdiv Municipality. His professional work is directly concerned with spatial planning, investment design and the development of the urban environment. He has long practical experience of the planning and development of Trakia District in Plovdiv.

Eng. Emil Boychev Member
Eng. Emil Boychev

Chair of the Regional Professional Section “Structures of Buildings and Facilities” at the Chamber of Engineers in Investment Design (CEID), Plovdiv

Biography

Eng. Emil Boychev represents the Chamber of Engineers in Investment Design and is Chair of the Regional Professional Section “Structures of Buildings and Facilities” at CEID Plovdiv. He also takes part in the Chamber’s professional initiatives, including organising national scientific and applied forums in structural and investment design.

Arch. Nina Toleva-Novak Reserve member
Arch. Nina Toleva-Novak

Deputy Director of the Municipal Institute “Old Plovdiv”

Biography

Arch. Nina Toleva-Novak is an architect with professional and research interests in the history and theory of architecture and urban planning, urban morphology and interdisciplinary studies. She is the author of research on the development of Plovdiv and the transformation of its city centre through different historical periods. She is currently Deputy Director of the Municipal Institute “Old Plovdiv”, which ties her work directly to the conservation, management and presentation of the city’s architectural and cultural heritage.

Archaeologist Chief Assist. Prof. Desislava Davidova Reserve member
Archaeologist Chief Assist. Prof. Desislava Davidova

Regional Archaeological Museum, Plovdiv

Biography

Chief Assist. Prof. Desislava Davidova is an archaeologist and numismatist at the Regional Archaeological Museum in Plovdiv. She takes part in the museum’s research and exhibition work and is engaged in the study and presentation of Plovdiv’s archaeological heritage. In 2026 she was curator and author of the concept of the exhibition “Human Passions: The Price of Desire”, which presented all 786 gold coins of the Gornoslav Treasure to the public for the first time. She has also taken part in scientific forums on the archaeological investigation of the Episcopal Basilica of Philippopolis.

Location

The Trimontium underpass occupies a key position in the urban structure of Plovdiv, at the junction of Tsar Boris III Obedinitel Boulevard and Kapitan Raycho Street, immediately adjacent to Tsentralen Square. The junction brings together four main city axes: Tsar Boris III Obedinitel Boulevard (the north-south through route), Kapitan Raycho Street (the east-west route), Ivan Vazov Street, and the approach to the main pedestrian street, Knyaz Alexander I Battenberg.
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