Piacenza has the roman squared city center intact in layout[1], lots of other small towns as well, but the fact is the old town parts are likely too small to actually matter when you look at the whole city layout - hard to notice from just looking at the urban map!<p>then you have places like Turin that were built with a ruler [2]<p><a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Via+Camillo+Benso+Cavour,+37,+29121+Piacenza+PC&#x2F;@45.0535637,9.696712,17z&#x2F;data=!4m7!1m4!3m3!1s0x4780dd5d846b46f9:0x51f69c98ad5dd080!2sVia+Borghetto,+29121+Piacenza+PC!3b1!3m1!1s0x4780dd5ee54fc553:0x64d649c17a854eba!6m1!1e1" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Via+Camillo+Benso+Cavour,+3...</a><p><a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Turin,+Metropolitan+City+of+Turin&#x2F;@45.0653871,7.6696611,14.75z&#x2F;data=!4m2!3m1!1s0x47886d0cc3ed5cdf:0x405e67d473c94e0" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Turin,+Metropolitan+City+of...</a><p>edit: some more samples, with cardo&#x2F;decumano marked when known<p>naples
<a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Naples,+Metropolitan+City+of+Naples&#x2F;@40.8413926,14.247351,18.25z&#x2F;data=!4m2!3m1!1s0x133b084f6a6c7e99:0x3df52cc13b78191d" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Naples,+Metropolitan+City+o...</a><p>parma (barely visible, linked plaza was the old forum)
<a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Piazza+Giuseppe+Garibaldi,+1,+43121+Parma+PR&#x2F;@44.8014151,10.3284871,18.85z&#x2F;data=!4m2!3m1!1s0x47806ae658e227e1:0xd4ef6bcbe7faf4ea" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Piazza+Giuseppe+Garibaldi,+...</a><p>verona
<a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Via+Rosa,+7,+37121+Verona+VR&#x2F;@45.4446212,10.9968018,17.75z&#x2F;data=!4m2!3m1!1s0x477f5f4958041e89:0x9f4341065220e9ac" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Via+Rosa,+7,+37121+Verona+V...</a><p>firenze, you can even see the old walls<p><a href="https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Piazza+della+Repubblica,+10,+50123+Firenze&#x2F;@43.7713588,11.2541992,17.75z&#x2F;data=!4m2!3m1!1s0x132a54019458448f:0x346f9c6ac1205f60" rel="nofollow">https:&#x2F;&#x2F;www.google.it&#x2F;maps&#x2F;place&#x2F;Piazza+della+Repubblica,+10...</a>