  A wide variety of ring-like dust structures has been detected in
protoplanetary disks, but their origin and frequency are still unclear. We
characterize the structure of an extended, multi-ringed disk discovered
serendipitously in the ALMA Lupus disk survey and put it in the context of the
Lupus disk population. ALMA observations in Band 6 at 234 GHz and Band 7 at 328
GHz at 0.3" resolution toward the K6 star V1094 Sco in Lupus III are presented,
and its disk structure is analyzed. The spectral index $\alpha_{mm}$ is
determined in the inner 150 AU of the disk. The ALMA continuum data show a very
extended disk with two gap/ring pairs. The gaps are located at 100 AU and 170
AU, the bright rings at 130 AU and 220 AU. Continuum emission is detected out
to a 300 AU distance, similar to IM Lup but a factor of 5 larger than typically
found for Lupus disks at this sensitivity and resolution. The bright central
region of the disk (within 35 AU) is possibly optically thick at 1 mm
wavelengths, and has a brightness temperature of only 13 K. The spectral index
increases between the inner disk and the first ring, at the location of the
first gap. Due to the low temperature of the disk midplane, snow lines can be
excluded as the drivers behind the ring and gap formation in this disk. Disks
the size of V1094 Sco are rare, and only 2.1+-1.5% of disks in Lupus show
continuum emission beyond 200 AU. Possible connections between the large
primordial disk population, transition disks, and exoplanets are discussed.
