Summary sketch of observational information on the Scorpius–Centaurus region. The OB-association Sco–Cen OB2 has three subgroups of ≈2000 M_⊙ each, formed over the last ≈15–20 Myr. Stars are currently forming in the ρ Ophiuchus (moving away from USco at about 1 km s⁻¹) and Lupus I (part of an expanding Hi loop around USco) molecular clouds. See Table 1 for more details on the stars. Hi shells are detected around the youngest OB subgroup, USco, and around the entire region. Diffuse soft X-ray emission is detected towards the superbubble at a level of 10³⁵ erg s⁻¹. One of the detected signatures of massive star winds and supernova explosions is ²⁶Al, towards USco.