Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE mill ( architect_id VARCHAR )
TABLE: CREATE TABLE architect ( id VARCHAR, name VARCHAR, nationality VARCHAR )

### Question ###
What is the id, name and nationality of the architect who built most mills?

### Accurate SQL ###

SELECT T1.id, T1.name, T1.nationality FROM architect AS T1 JOIN mill AS T2 ON T1.id = T2.architect_id GROUP BY T1.id ORDER BY COUNT(*) DESC LIMIT 1