On 6.02.2020, during the Poznań BUDMA Fair, a seminar “Build of Steel” devoted to modern sustainable steel construction was held. MTA Engineering, partner of the “Build of Steel” program, took part in this year’s seminar. The President of the company, Krzysztof Ostrowski, presented examples of ecological investments as a part of the lecture entitled: “Building with Sustainable Steel”. The lecture entitled: “Design and manufacture of steel structures in ecological building”. During the seminar steel was presented as an efficient, competitive and ecological material with 90% recycling rate. Examples of ecological buildings and innovative ecological products were also presented. At the end of the seminar, the topic of modularization of steel structures was discussed in terms of the Steligence philosophy – a modern holistic trend that aims to reduce the negative impact of construction projects on the environment.