Combustion chamber of a combustion system

A combustion chamber of a combustion system, the combustion chamber comprising:

• a combustion space;
• a support structure;
• a heat shield with at least two segments, each segment including a liner element facing the combustion space and having an edge region, a gap communicating with the combustion space being formed between edge regions of adjacent segments, each of the liner elements being mounted to a support element disposed in a bottom region of the gap, and each of the heat shield segments including a retaining device fixing an edge region of the respective liner element on the support structure via the respective support element;
• at least one through-opening communicating with the gap so as to enable a cooling gas to flow through the through-opening into the gap thereby cooling a respective one of the edge regions facing the gap, wherein the at least one through-opening is disposed in at least one of the respective edge region and the support element at the bottom region of the gap wherein the retaining device has a flange region, and wherein the edge region of the respective liner element fits under the flange region.