Ahmed Raza Khan or Ala Hazrat, "Fazil-e-Barelvi" was a prominent Muslim Alim from Bareilly, a city in Northern India during the late 19th and early 20th centuries. Ala Hazrat has been recognized as the great Mujaddid of the 19th century. He has written many books on a vast range of topics covering religion, science and philosophy. A collection of fatwas by the title of Fatawa Ridawiyya, is his magna carta.

Imam Ahmad Raza followed Imam-e-Azam Abu Hanifa in Fiqh & Gaus-e-Azam Shiekh Abdul Qadir Jilani in Spiritualism.

He is referred to in India and Pakistan with titles as Aaqa-e-Ne'mat, Parwana-e-Sham'ma-e-Risalat, and et cetera.

A few interesting things i found about Ala Hazrat Imam Ahmed Raza Khan:

BLESSED QUALITIES
His Blessed Character; Obedience towards Parents; Respect towards the Superior Ulema; Respect for the Masjid; Love and Respect towards Pilgrims; Care for Children; A Few of Imam Ahmed Raza's Unique Habits; His Mystical Powers

OBEDIENCE TOWARDS PARENTS
After the demise of his father, Hadrat Allamah Mawlana Naqi Ali Khan (radi Allahu anhu), A'la Hadrat (radi Allahu anhu) inherited all his properties. Although he was the sole owner and beneficiary of these properties, A'la Hadrat (radi Allahu anhu) never spent a single cent of this wealth without first seeking the permission of his blessed mother. Even if he wished to buy a Kitaab for study purposes he asked permission from his mother!

When A'la Hadrat (radi Allahu anhu) wished to fulfill his heart's desire of being present in front of the Rauza-e-Anwar, the Blessed Tomb of Sayyiduna Rasulullah (sallal laahu alaihi wasallam), he first sought the permission of his blessed mother. She immediately granted him permission by saying: "Bismillahi Khuda Hafiz."

RESPECT FOR THE MASJID
Once, A'la Hadrat (radi Allahu anhu) was performing I'tikaaf in the Masjid in Bareilly Shareef. It was a cold winter's night. It was raining quiet heavily. A'la Hadrat (radi Allahu anhu) went to perform his Wudhu. In order not to allow the Masjid floors from becoming wet, he placed the blanket that he was wearing on to the Masjid floor by folding it four times to soak in the water. He then made his Wudhu on the blanket. Thus, he did not allow one drop of water to fall in the Masjid. A'la Hadrat (radi Allahu anhu) then spent the entire night shivering in the cold since he did not have a blanket to cover himself with because it was damp with water.

A FEW OF IMAM AHMED RAZA'S UNIQUE HABITS
1. He never kept any ordinary book on the books of Ahadith.
2. He would be displeased if anyone spoke out unnecessarily while he explained the Ahadith.
3. He did not prefer anyone to sit with one leg onto the lap of the other leg. He would usually sit with both knees erect.
4. He would sit in the position of Tashahhud from the beginning to the end in a Mehfil-e-Meelad (sallal laahu alaihi wasallam) which sometimes lasted for 5 or 6 hours.
5. He would never chew paan during a lecture.
6. On hearing the name "Muhammad", he would immediately say "Sallal laahu alaihi wasallam."
7. He would never laugh out aloud.
8. He slept in the position of the Arabic form of the word "Muhammad".
9. He would never spit or stretch his feet in the direction of the Qibla.
10. He always did everything form the right-hand-side.

Check out:
A site dedicated to Ala Hazrat Imam Ahmed Raza Khan
Ala Hazrat and Wikipedia