  The Infra-Red Telescope (IRT) is part of the payload of the THESEUS mission,
which is one of the two ESA M5 candidates within the Cosmic Vision program,
planned for launch in 2032. The THESEUS payload, composed by two high energy
wide field monitors (SXI and XGIS) and a near infra-red telescope (IRT), is
optimized to detect, localize and characterize Gamma-Ray Bursts and other
high-energy transients. The main goal of the IRT is to identify and precisely
localize the NIR counterparts of the high-energy sources and to measure their
distance. Here we present the design of the IRT and its expected performance.
