Top one is Roman, both images the wrong way round. (Clearer picture would help with the attribution).
Second is definitely Byzantine as 'alganbagerap' already said. The obverse (last picture needs to be rotated 135 degrees clockwise. Unfortunately the year and the mintmark seem not to be legible but attribution to the right ruler should be possible if 'echizento' sees it.
Second is definitely Byzantine as 'alganbagerap' already said. The obverse (last picture needs to be rotated 135 degrees clockwise. Unfortunately the year and the mintmark seem not to be legible but attribution to the right ruler should be possible if 'echizento' sees it.

























