  Moir\'e superlattices that consist of two or more layers of two-dimensional
materials stacked together with a small twist angle have emerged as a tunable
platform to realize various correlated and topological phases, such as Mott
insulators, unconventional uperconductivity and quantum anomalous Hall effect.
Recently, the magic-angle twisted trilayer graphene (MATTG) has shown both
robust superconductivity similar to magic-angle twisted bilayer graphene
(MATBG) and other unique properties, including the Pauli-limit violating and
re-entrant superconductivity. These rich properties are deeply rooted in its
electronic structure under the influence of distinct moir\'e potential and
mirror symmetry. Here, combining nanometer-scale spatially resolved
angle-resolved photoemission spectroscopy (nano-ARPES) and scanning tunneling
microscopy/spectroscopy (STM/STS), we systematically measure the yet unexplored
band structure of MATTG near charge neutrality. Our measurements reveal the
coexistence of the distinct dispersive Dirac band with the emergent moir\'e
flat band, showing nice agreement with the theoretical calculations. These
results serve as a stepstone for further understanding of the unconventional
superconductivity in MATTG.
